Home / 129,279,682.78-178,359,343.12-99,519,432.68

Finding the Fourth Proportional to 129,279,682.78, 178,359,343.12 and 99,519,432.68

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Solution

The fourth proportional to 129,279,682.78, 178,359,343.12 and 99,519,432.68 is: 137,300,929.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,279,682.78 : 178,359,343.12 = 99,519,432.68 : x
  2. Step 2: Convert to fraction form
    129,279,682.78/178,359,343.12 = 99,519,432.68/x
  3. Step 3: Cross multiply
    129,279,682.78x = 178,359,343.12 × 99,519,432.68
  4. Step 4: Simplify right side
    129,279,682.78x = 17,750,220,640,479,862
  5. Step 5: Solve for x
    x = 17,750,220,640,479,862/129,279,682.78
  6. Step 6: Final answer
    x = 137,300,929.73

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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.