Home / 87,972.89-121,402.80-47,686.32

Finding the Fourth Proportional to 87,972.89, 121,402.80 and 47,686.32

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Solution

The fourth proportional to 87,972.89, 121,402.80 and 47,686.32 is: 65,807.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,972.89 : 121,402.80 = 47,686.32 : x
  2. Step 2: Convert to fraction form
    87,972.89/121,402.80 = 47,686.32/x
  3. Step 3: Cross multiply
    87,972.89x = 121,402.80 × 47,686.32
  4. Step 4: Simplify right side
    87,972.89x = 5,789,252,769.70
  5. Step 5: Solve for x
    x = 5,789,252,769.70/87,972.89
  6. Step 6: Final answer
    x = 65,807.24

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1.5x scale

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.