Home / 112,909.60-155,743.68-72,553.92

Finding the Fourth Proportional to 112,909.60, 155,743.68 and 72,553.92

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Solution

The fourth proportional to 112,909.60, 155,743.68 and 72,553.92 is: 100,078.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,909.60 : 155,743.68 = 72,553.92 : x
  2. Step 2: Convert to fraction form
    112,909.60/155,743.68 = 72,553.92/x
  3. Step 3: Cross multiply
    112,909.60x = 155,743.68 × 72,553.92
  4. Step 4: Simplify right side
    112,909.60x = 11,299,814,499.23
  5. Step 5: Solve for x
    x = 11,299,814,499.23/112,909.60
  6. Step 6: Final answer
    x = 100,078.42

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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.