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Finding the Fourth Proportional to 252,709.30, 379,063.95 and 65,720.80

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Solution

The fourth proportional to 252,709.30, 379,063.95 and 65,720.80 is: 98,581.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,709.30 : 379,063.95 = 65,720.80 : x
  2. Step 2: Convert to fraction form
    252,709.30/379,063.95 = 65,720.80/x
  3. Step 3: Cross multiply
    252,709.30x = 379,063.95 × 65,720.80
  4. Step 4: Simplify right side
    252,709.30x = 24,912,386,045.16
  5. Step 5: Solve for x
    x = 24,912,386,045.16/252,709.30
  6. Step 6: Final answer
    x = 98,581.20

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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.