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Finding the Fourth Proportional to 71,681.57, 98,926.55 and 39,853.43

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Solution

The fourth proportional to 71,681.57, 98,926.55 and 39,853.43 is: 55,001.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,681.57 : 98,926.55 = 39,853.43 : x
  2. Step 2: Convert to fraction form
    71,681.57/98,926.55 = 39,853.43/x
  3. Step 3: Cross multiply
    71,681.57x = 98,926.55 × 39,853.43
  4. Step 4: Simplify right side
    71,681.57x = 3,942,561,641.67
  5. Step 5: Solve for x
    x = 3,942,561,641.67/71,681.57
  6. Step 6: Final answer
    x = 55,001.05

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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.