Home / 74,157.68-102,344.80-42,331.28

Finding the Fourth Proportional to 74,157.68, 102,344.80 and 42,331.28

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Solution

The fourth proportional to 74,157.68, 102,344.80 and 42,331.28 is: 58,421.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,157.68 : 102,344.80 = 42,331.28 : x
  2. Step 2: Convert to fraction form
    74,157.68/102,344.80 = 42,331.28/x
  3. Step 3: Cross multiply
    74,157.68x = 102,344.80 × 42,331.28
  4. Step 4: Simplify right side
    74,157.68x = 4,332,386,385.34
  5. Step 5: Solve for x
    x = 4,332,386,385.34/74,157.68
  6. Step 6: Final answer
    x = 58,421.28

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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.