Home / 129,213.45-178,301.93-72,623.61

Finding the Fourth Proportional to 129,213.45, 178,301.93 and 72,623.61

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Solution

The fourth proportional to 129,213.45, 178,301.93 and 72,623.61 is: 100,213.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,213.45 : 178,301.93 = 72,623.61 : x
  2. Step 2: Convert to fraction form
    129,213.45/178,301.93 = 72,623.61/x
  3. Step 3: Cross multiply
    129,213.45x = 178,301.93 × 72,623.61
  4. Step 4: Simplify right side
    129,213.45x = 12,948,929,463.45
  5. Step 5: Solve for x
    x = 12,948,929,463.45/129,213.45
  6. Step 6: Final answer
    x = 100,213.48

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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.