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Finding the Fourth Proportional to 280,123.60, 420,185.40 and 93,135.10

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Solution

The fourth proportional to 280,123.60, 420,185.40 and 93,135.10 is: 139,702.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,123.60 : 420,185.40 = 93,135.10 : x
  2. Step 2: Convert to fraction form
    280,123.60/420,185.40 = 93,135.10/x
  3. Step 3: Cross multiply
    280,123.60x = 420,185.40 × 93,135.10
  4. Step 4: Simplify right side
    280,123.60x = 39,134,009,247.54
  5. Step 5: Solve for x
    x = 39,134,009,247.54/280,123.60
  6. Step 6: Final answer
    x = 139,702.65

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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.