Home / 87,916.16-121,324.11-47,631

Finding the Fourth Proportional to 87,916.16, 121,324.11 and 47,631

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Solution

The fourth proportional to 87,916.16, 121,324.11 and 47,631 is: 65,730.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,916.16 : 121,324.11 = 47,631 : x
  2. Step 2: Convert to fraction form
    87,916.16/121,324.11 = 47,631/x
  3. Step 3: Cross multiply
    87,916.16x = 121,324.11 × 47,631
  4. Step 4: Simplify right side
    87,916.16x = 5,778,788,683.41
  5. Step 5: Solve for x
    x = 5,778,788,683.41/87,916.16
  6. Step 6: Final answer
    x = 65,730.68

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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.