Home / 87,916.98-121,325.46-47,631

Finding the Fourth Proportional to 87,916.98, 121,325.46 and 47,631

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Solution

The fourth proportional to 87,916.98, 121,325.46 and 47,631 is: 65,730.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,916.98 : 121,325.46 = 47,631 : x
  2. Step 2: Convert to fraction form
    87,916.98/121,325.46 = 47,631/x
  3. Step 3: Cross multiply
    87,916.98x = 121,325.46 × 47,631
  4. Step 4: Simplify right side
    87,916.98x = 5,778,852,985.26
  5. Step 5: Solve for x
    x = 5,778,852,985.26/87,916.98
  6. Step 6: Final answer
    x = 65,730.79

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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.