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Finding the Fourth Proportional to 119,104.55, 178,619.17 and 39,129.38

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Solution

The fourth proportional to 119,104.55, 178,619.17 and 39,129.38 is: 58,681.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,104.55 : 178,619.17 = 39,129.38 : x
  2. Step 2: Convert to fraction form
    119,104.55/178,619.17 = 39,129.38/x
  3. Step 3: Cross multiply
    119,104.55x = 178,619.17 × 39,129.38
  4. Step 4: Simplify right side
    119,104.55x = 6,989,257,378.21
  5. Step 5: Solve for x
    x = 6,989,257,378.21/119,104.55
  6. Step 6: Final answer
    x = 58,681.70

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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.