Home / 129,180.70-193,566.39-99,670.78

Finding the Fourth Proportional to 129,180.70, 193,566.39 and 99,670.78

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Solution

The fourth proportional to 129,180.70, 193,566.39 and 99,670.78 is: 149,348.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,180.70 : 193,566.39 = 99,670.78 : x
  2. Step 2: Convert to fraction form
    129,180.70/193,566.39 = 99,670.78/x
  3. Step 3: Cross multiply
    129,180.70x = 193,566.39 × 99,670.78
  4. Step 4: Simplify right side
    129,180.70x = 19,292,913,073.08
  5. Step 5: Solve for x
    x = 19,292,913,073.08/129,180.70
  6. Step 6: Final answer
    x = 149,348.26

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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.