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Finding the Fourth Proportional to 536,123.70, 804,185.55 and 142,139.70

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Solution

The fourth proportional to 536,123.70, 804,185.55 and 142,139.70 is: 213,209.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    536,123.70 : 804,185.55 = 142,139.70 : x
  2. Step 2: Convert to fraction form
    536,123.70/804,185.55 = 142,139.70/x
  3. Step 3: Cross multiply
    536,123.70x = 804,185.55 × 142,139.70
  4. Step 4: Simplify right side
    536,123.70x = 114,306,692,821.34
  5. Step 5: Solve for x
    x = 114,306,692,821.34/536,123.70
  6. Step 6: Final answer
    x = 213,209.55

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.