Home / 129,145.76-178,224.45-71,001.79

Finding the Fourth Proportional to 129,145.76, 178,224.45 and 71,001.79

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Solution

The fourth proportional to 129,145.76, 178,224.45 and 71,001.79 is: 97,984.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,145.76 : 178,224.45 = 71,001.79 : x
  2. Step 2: Convert to fraction form
    129,145.76/178,224.45 = 71,001.79/x
  3. Step 3: Cross multiply
    129,145.76x = 178,224.45 × 71,001.79
  4. Step 4: Simplify right side
    129,145.76x = 12,654,254,971.77
  5. Step 5: Solve for x
    x = 12,654,254,971.77/129,145.76
  6. Step 6: Final answer
    x = 97,984.29

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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.