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Finding the Fourth Proportional to 130,755, 180,434.28 and 73,389

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Solution

The fourth proportional to 130,755, 180,434.28 and 73,389 is: 101,272.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,755 : 180,434.28 = 73,389 : x
  2. Step 2: Convert to fraction form
    130,755/180,434.28 = 73,389/x
  3. Step 3: Cross multiply
    130,755x = 180,434.28 × 73,389
  4. Step 4: Simplify right side
    130,755x = 13,241,891,374.92
  5. Step 5: Solve for x
    x = 13,241,891,374.92/130,755
  6. Step 6: Final answer
    x = 101,272.54

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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.