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Finding the Fourth Proportional to 74,645.28, 103,023.90 and 42,824.70

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Solution

The fourth proportional to 74,645.28, 103,023.90 and 42,824.70 is: 59,105.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,645.28 : 103,023.90 = 42,824.70 : x
  2. Step 2: Convert to fraction form
    74,645.28/103,023.90 = 42,824.70/x
  3. Step 3: Cross multiply
    74,645.28x = 103,023.90 × 42,824.70
  4. Step 4: Simplify right side
    74,645.28x = 4,411,967,610.33
  5. Step 5: Solve for x
    x = 4,411,967,610.33/74,645.28
  6. Step 6: Final answer
    x = 59,105.78

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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.