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Finding the Fourth Proportional to 71,398.65, 98,534.06 and 39,566.87

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Solution

The fourth proportional to 71,398.65, 98,534.06 and 39,566.87 is: 54,604.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,398.65 : 98,534.06 = 39,566.87 : x
  2. Step 2: Convert to fraction form
    71,398.65/98,534.06 = 39,566.87/x
  3. Step 3: Cross multiply
    71,398.65x = 98,534.06 × 39,566.87
  4. Step 4: Simplify right side
    71,398.65x = 3,898,683,800.46
  5. Step 5: Solve for x
    x = 3,898,683,800.46/71,398.65
  6. Step 6: Final answer
    x = 54,604.45

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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.