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Finding the Fourth Proportional to 74,503.72, 102,815.25 and 40,512.17

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Solution

The fourth proportional to 74,503.72, 102,815.25 and 40,512.17 is: 55,906.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,503.72 : 102,815.25 = 40,512.17 : x
  2. Step 2: Convert to fraction form
    74,503.72/102,815.25 = 40,512.17/x
  3. Step 3: Cross multiply
    74,503.72x = 102,815.25 × 40,512.17
  4. Step 4: Simplify right side
    74,503.72x = 4,165,268,886.59
  5. Step 5: Solve for x
    x = 4,165,268,886.59/74,503.72
  6. Step 6: Final answer
    x = 55,906.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.