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Finding the Fourth Proportional to 71,548.55, 98,740.01 and 39,717.47

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Solution

The fourth proportional to 71,548.55, 98,740.01 and 39,717.47 is: 54,811.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,548.55 : 98,740.01 = 39,717.47 : x
  2. Step 2: Convert to fraction form
    71,548.55/98,740.01 = 39,717.47/x
  3. Step 3: Cross multiply
    71,548.55x = 98,740.01 × 39,717.47
  4. Step 4: Simplify right side
    71,548.55x = 3,921,703,731.12
  5. Step 5: Solve for x
    x = 3,921,703,731.12/71,548.55
  6. Step 6: Final answer
    x = 54,811.79

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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.