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Finding the Fourth Proportional to 253,130.70, 379,700.55 and 75,639.90

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Solution

The fourth proportional to 253,130.70, 379,700.55 and 75,639.90 is: 113,461.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,130.70 : 379,700.55 = 75,639.90 : x
  2. Step 2: Convert to fraction form
    253,130.70/379,700.55 = 75,639.90/x
  3. Step 3: Cross multiply
    253,130.70x = 379,700.55 × 75,639.90
  4. Step 4: Simplify right side
    253,130.70x = 28,720,511,631.95
  5. Step 5: Solve for x
    x = 28,720,511,631.95/253,130.70
  6. Step 6: Final answer
    x = 113,461.19

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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.