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Finding the Fourth Proportional to 71,985.34, 99,286.21 and 52,859.13

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Solution

The fourth proportional to 71,985.34, 99,286.21 and 52,859.13 is: 72,906.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,985.34 : 99,286.21 = 52,859.13 : x
  2. Step 2: Convert to fraction form
    71,985.34/99,286.21 = 52,859.13/x
  3. Step 3: Cross multiply
    71,985.34x = 99,286.21 × 52,859.13
  4. Step 4: Simplify right side
    71,985.34x = 5,248,182,681.60
  5. Step 5: Solve for x
    x = 5,248,182,681.60/71,985.34
  6. Step 6: Final answer
    x = 72,906.27

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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.