Home / 129,279.48-178,453.98-75,581.70

Finding the Fourth Proportional to 129,279.48, 178,453.98 and 75,581.70

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Solution

The fourth proportional to 129,279.48, 178,453.98 and 75,581.70 is: 104,330.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,279.48 : 178,453.98 = 75,581.70 : x
  2. Step 2: Convert to fraction form
    129,279.48/178,453.98 = 75,581.70/x
  3. Step 3: Cross multiply
    129,279.48x = 178,453.98 × 75,581.70
  4. Step 4: Simplify right side
    129,279.48x = 13,487,855,180.17
  5. Step 5: Solve for x
    x = 13,487,855,180.17/129,279.48
  6. Step 6: Final answer
    x = 104,330.98

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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.