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Finding the Fourth Proportional to 71,770.88, 99,032.64 and 39,939.68

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Solution

The fourth proportional to 71,770.88, 99,032.64 and 39,939.68 is: 55,110.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,770.88 : 99,032.64 = 39,939.68 : x
  2. Step 2: Convert to fraction form
    71,770.88/99,032.64 = 39,939.68/x
  3. Step 3: Cross multiply
    71,770.88x = 99,032.64 × 39,939.68
  4. Step 4: Simplify right side
    71,770.88x = 3,955,331,951.16
  5. Step 5: Solve for x
    x = 3,955,331,951.16/71,770.88
  6. Step 6: Final answer
    x = 55,110.54

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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.