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Finding the Fourth Proportional to 131,042.96, 180,839.28 and 74,454.40

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Solution

The fourth proportional to 131,042.96, 180,839.28 and 74,454.40 is: 102,747.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,042.96 : 180,839.28 = 74,454.40 : x
  2. Step 2: Convert to fraction form
    131,042.96/180,839.28 = 74,454.40/x
  3. Step 3: Cross multiply
    131,042.96x = 180,839.28 × 74,454.40
  4. Step 4: Simplify right side
    131,042.96x = 13,464,280,088.83
  5. Step 5: Solve for x
    x = 13,464,280,088.83/131,042.96
  6. Step 6: Final answer
    x = 102,747.07

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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.