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Finding the Fourth Proportional to 178,210.60, 267,387.90 and 78,389.80

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Solution

The fourth proportional to 178,210.60, 267,387.90 and 78,389.80 is: 117,616.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,210.60 : 267,387.90 = 78,389.80 : x
  2. Step 2: Convert to fraction form
    178,210.60/267,387.90 = 78,389.80/x
  3. Step 3: Cross multiply
    178,210.60x = 267,387.90 × 78,389.80
  4. Step 4: Simplify right side
    178,210.60x = 20,960,484,003.42
  5. Step 5: Solve for x
    x = 20,960,484,003.42/178,210.60
  6. Step 6: Final answer
    x = 117,616.37

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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.