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Finding the Fourth Proportional to 92,565.79, 127,651.34 and 78,225.95

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Solution

The fourth proportional to 92,565.79, 127,651.34 and 78,225.95 is: 107,876.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,565.79 : 127,651.34 = 78,225.95 : x
  2. Step 2: Convert to fraction form
    92,565.79/127,651.34 = 78,225.95/x
  3. Step 3: Cross multiply
    92,565.79x = 127,651.34 × 78,225.95
  4. Step 4: Simplify right side
    92,565.79x = 9,985,647,854.97
  5. Step 5: Solve for x
    x = 9,985,647,854.97/92,565.79
  6. Step 6: Final answer
    x = 107,876.23

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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.