Home / 129,272.42-178,393.79-71,911.06

Finding the Fourth Proportional to 129,272.42, 178,393.79 and 71,911.06

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Solution

The fourth proportional to 129,272.42, 178,393.79 and 71,911.06 is: 99,236.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,272.42 : 178,393.79 = 71,911.06 : x
  2. Step 2: Convert to fraction form
    129,272.42/178,393.79 = 71,911.06/x
  3. Step 3: Cross multiply
    129,272.42x = 178,393.79 × 71,911.06
  4. Step 4: Simplify right side
    129,272.42x = 12,828,486,270.11
  5. Step 5: Solve for x
    x = 12,828,486,270.11/129,272.42
  6. Step 6: Final answer
    x = 99,236.06

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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.