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Finding the Fourth Proportional to 78,869.98, 118,323.80 and 26,279.92

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Solution

The fourth proportional to 78,869.98, 118,323.80 and 26,279.92 is: 39,426.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,869.98 : 118,323.80 = 26,279.92 : x
  2. Step 2: Convert to fraction form
    78,869.98/118,323.80 = 26,279.92/x
  3. Step 3: Cross multiply
    78,869.98x = 118,323.80 × 26,279.92
  4. Step 4: Simplify right side
    78,869.98x = 3,109,539,275.08
  5. Step 5: Solve for x
    x = 3,109,539,275.08/78,869.98
  6. Step 6: Final answer
    x = 39,426.15

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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.