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Finding the Fourth Proportional to 70,761.84, 97,649.20 and 38,930.72

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Solution

The fourth proportional to 70,761.84, 97,649.20 and 38,930.72 is: 53,723.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,761.84 : 97,649.20 = 38,930.72 : x
  2. Step 2: Convert to fraction form
    70,761.84/97,649.20 = 38,930.72/x
  3. Step 3: Cross multiply
    70,761.84x = 97,649.20 × 38,930.72
  4. Step 4: Simplify right side
    70,761.84x = 3,801,553,663.42
  5. Step 5: Solve for x
    x = 3,801,553,663.42/70,761.84
  6. Step 6: Final answer
    x = 53,723.22

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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.