Home / 87,702.68-121,040.78-57,513.40

Finding the Fourth Proportional to 87,702.68, 121,040.78 and 57,513.40

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Solution

The fourth proportional to 87,702.68, 121,040.78 and 57,513.40 is: 79,375.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,702.68 : 121,040.78 = 57,513.40 : x
  2. Step 2: Convert to fraction form
    87,702.68/121,040.78 = 57,513.40/x
  3. Step 3: Cross multiply
    87,702.68x = 121,040.78 × 57,513.40
  4. Step 4: Simplify right side
    87,702.68x = 6,961,466,796.45
  5. Step 5: Solve for x
    x = 6,961,466,796.45/87,702.68
  6. Step 6: Final answer
    x = 79,375.76

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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.