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Finding the Fourth Proportional to 261,449.52, 392,129.05 and 69,325.22

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Solution

The fourth proportional to 261,449.52, 392,129.05 and 69,325.22 is: 103,975.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,449.52 : 392,129.05 = 69,325.22 : x
  2. Step 2: Convert to fraction form
    261,449.52/392,129.05 = 69,325.22/x
  3. Step 3: Cross multiply
    261,449.52x = 392,129.05 × 69,325.22
  4. Step 4: Simplify right side
    261,449.52x = 27,184,432,126.15
  5. Step 5: Solve for x
    x = 27,184,432,126.15/261,449.52
  6. Step 6: Final answer
    x = 103,975.83

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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.