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Finding the Fourth Proportional to 87,656.11, 120,965.47 and 47,369.86

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Solution

The fourth proportional to 87,656.11, 120,965.47 and 47,369.86 is: 65,370.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,656.11 : 120,965.47 = 47,369.86 : x
  2. Step 2: Convert to fraction form
    87,656.11/120,965.47 = 47,369.86/x
  3. Step 3: Cross multiply
    87,656.11x = 120,965.47 × 47,369.86
  4. Step 4: Simplify right side
    87,656.11x = 5,730,116,957.90
  5. Step 5: Solve for x
    x = 5,730,116,957.90/87,656.11
  6. Step 6: Final answer
    x = 65,370.42

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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.