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Finding the Fourth Proportional to 71,920.80, 99,250.74 and 40,088.97

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Solution

The fourth proportional to 71,920.80, 99,250.74 and 40,088.97 is: 55,322.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,920.80 : 99,250.74 = 40,088.97 : x
  2. Step 2: Convert to fraction form
    71,920.80/99,250.74 = 40,088.97/x
  3. Step 3: Cross multiply
    71,920.80x = 99,250.74 × 40,088.97
  4. Step 4: Simplify right side
    71,920.80x = 3,978,859,938.34
  5. Step 5: Solve for x
    x = 3,978,859,938.34/71,920.80
  6. Step 6: Final answer
    x = 55,322.80

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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.