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Finding the Fourth Proportional to 611,314.20, 916,971.30 and 168,082.20

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Solution

The fourth proportional to 611,314.20, 916,971.30 and 168,082.20 is: 252,123.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,314.20 : 916,971.30 = 168,082.20 : x
  2. Step 2: Convert to fraction form
    611,314.20/916,971.30 = 168,082.20/x
  3. Step 3: Cross multiply
    611,314.20x = 916,971.30 × 168,082.20
  4. Step 4: Simplify right side
    611,314.20x = 154,126,553,440.86
  5. Step 5: Solve for x
    x = 154,126,553,440.86/611,314.20
  6. Step 6: Final answer
    x = 252,123.30

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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.