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Finding the Fourth Proportional to 178,712.40, 268,068.60 and 108,613.20

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Solution

The fourth proportional to 178,712.40, 268,068.60 and 108,613.20 is: 162,919.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,712.40 : 268,068.60 = 108,613.20 : x
  2. Step 2: Convert to fraction form
    178,712.40/268,068.60 = 108,613.20/x
  3. Step 3: Cross multiply
    178,712.40x = 268,068.60 × 108,613.20
  4. Step 4: Simplify right side
    178,712.40x = 29,115,788,465.52
  5. Step 5: Solve for x
    x = 29,115,788,465.52/178,712.40
  6. Step 6: Final answer
    x = 162,919.80

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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.