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Finding the Fourth Proportional to 81,707.88, 122,577.27 and 28,397.85

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Solution

The fourth proportional to 81,707.88, 122,577.27 and 28,397.85 is: 42,602.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,707.88 : 122,577.27 = 28,397.85 : x
  2. Step 2: Convert to fraction form
    81,707.88/122,577.27 = 28,397.85/x
  3. Step 3: Cross multiply
    81,707.88x = 122,577.27 × 28,397.85
  4. Step 4: Simplify right side
    81,707.88x = 3,480,930,926.87
  5. Step 5: Solve for x
    x = 3,480,930,926.87/81,707.88
  6. Step 6: Final answer
    x = 42,602.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.