Home / 87,807.78-121,174.02-47,520.72

Finding the Fourth Proportional to 87,807.78, 121,174.02 and 47,520.72

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Solution

The fourth proportional to 87,807.78, 121,174.02 and 47,520.72 is: 65,578.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,807.78 : 121,174.02 = 47,520.72 : x
  2. Step 2: Convert to fraction form
    87,807.78/121,174.02 = 47,520.72/x
  3. Step 3: Cross multiply
    87,807.78x = 121,174.02 × 47,520.72
  4. Step 4: Simplify right side
    87,807.78x = 5,758,276,675.69
  5. Step 5: Solve for x
    x = 5,758,276,675.69/87,807.78
  6. Step 6: Final answer
    x = 65,578.21

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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.