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Finding the Fourth Proportional to 207,630.10, 311,445.15 and 102,654.10

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Solution

The fourth proportional to 207,630.10, 311,445.15 and 102,654.10 is: 153,981.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,630.10 : 311,445.15 = 102,654.10 : x
  2. Step 2: Convert to fraction form
    207,630.10/311,445.15 = 102,654.10/x
  3. Step 3: Cross multiply
    207,630.10x = 311,445.15 × 102,654.10
  4. Step 4: Simplify right side
    207,630.10x = 31,971,121,572.62
  5. Step 5: Solve for x
    x = 31,971,121,572.62/207,630.10
  6. Step 6: Final answer
    x = 153,981.15

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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.