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Finding the Fourth Proportional to 71,852.65, 99,156.76 and 39,146.90

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Solution

The fourth proportional to 71,852.65, 99,156.76 and 39,146.90 is: 54,022.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,852.65 : 99,156.76 = 39,146.90 : x
  2. Step 2: Convert to fraction form
    71,852.65/99,156.76 = 39,146.90/x
  3. Step 3: Cross multiply
    71,852.65x = 99,156.76 × 39,146.90
  4. Step 4: Simplify right side
    71,852.65x = 3,881,679,801.87
  5. Step 5: Solve for x
    x = 3,881,679,801.87/71,852.65
  6. Step 6: Final answer
    x = 54,022.78

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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.