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Finding the Fourth Proportional to 147,211.70, 220,817.55 and 84,830.90

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Solution

The fourth proportional to 147,211.70, 220,817.55 and 84,830.90 is: 127,246.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,211.70 : 220,817.55 = 84,830.90 : x
  2. Step 2: Convert to fraction form
    147,211.70/220,817.55 = 84,830.90/x
  3. Step 3: Cross multiply
    147,211.70x = 220,817.55 × 84,830.90
  4. Step 4: Simplify right side
    147,211.70x = 18,732,151,502.30
  5. Step 5: Solve for x
    x = 18,732,151,502.30/147,211.70
  6. Step 6: Final answer
    x = 127,246.35

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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.