Home / 391,663,876.43-587,371,172.46-129,299,576.87

Finding the Fourth Proportional to 391,663,876.43, 587,371,172.46 and 129,299,576.87

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Solution

The fourth proportional to 391,663,876.43, 587,371,172.46 and 129,299,576.87 is: 193,908,217.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,663,876.43 : 587,371,172.46 = 129,299,576.87 : x
  2. Step 2: Convert to fraction form
    391,663,876.43/587,371,172.46 = 129,299,576.87/x
  3. Step 3: Cross multiply
    391,663,876.43x = 587,371,172.46 × 129,299,576.87
  4. Step 4: Simplify right side
    391,663,876.43x = 75,946,844,065,696,064
  5. Step 5: Solve for x
    x = 75,946,844,065,696,064/391,663,876.43
  6. Step 6: Final answer
    x = 193,908,217.31

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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.