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Finding the Fourth Proportional to 178,079.60, 267,218.40 and 72,891.20

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Solution

The fourth proportional to 178,079.60, 267,218.40 and 72,891.20 is: 109,377.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,079.60 : 267,218.40 = 72,891.20 : x
  2. Step 2: Convert to fraction form
    178,079.60/267,218.40 = 72,891.20/x
  3. Step 3: Cross multiply
    178,079.60x = 267,218.40 × 72,891.20
  4. Step 4: Simplify right side
    178,079.60x = 19,477,869,838.08
  5. Step 5: Solve for x
    x = 19,477,869,838.08/178,079.60
  6. Step 6: Final answer
    x = 109,377.32

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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.