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Finding the Fourth Proportional to 112,209.60, 168,508.80 and 59,721.60

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Solution

The fourth proportional to 112,209.60, 168,508.80 and 59,721.60 is: 89,685.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,209.60 : 168,508.80 = 59,721.60 : x
  2. Step 2: Convert to fraction form
    112,209.60/168,508.80 = 59,721.60/x
  3. Step 3: Cross multiply
    112,209.60x = 168,508.80 × 59,721.60
  4. Step 4: Simplify right side
    112,209.60x = 10,063,615,150.08
  5. Step 5: Solve for x
    x = 10,063,615,150.08/112,209.60
  6. Step 6: Final answer
    x = 89,685.87

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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.