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Finding the Fourth Proportional to 316,139.52, 436,272.84 and 172,899.12

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Solution

The fourth proportional to 316,139.52, 436,272.84 and 172,899.12 is: 238,600.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,139.52 : 436,272.84 = 172,899.12 : x
  2. Step 2: Convert to fraction form
    316,139.52/436,272.84 = 172,899.12/x
  3. Step 3: Cross multiply
    316,139.52x = 436,272.84 × 172,899.12
  4. Step 4: Simplify right side
    316,139.52x = 75,431,190,115.90
  5. Step 5: Solve for x
    x = 75,431,190,115.90/316,139.52
  6. Step 6: Final answer
    x = 238,600.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.