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Finding the Fourth Proportional to 87,907.28, 121,312.28 and 47,620.92

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Solution

The fourth proportional to 87,907.28, 121,312.28 and 47,620.92 is: 65,717.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,907.28 : 121,312.28 = 47,620.92 : x
  2. Step 2: Convert to fraction form
    87,907.28/121,312.28 = 47,620.92/x
  3. Step 3: Cross multiply
    87,907.28x = 121,312.28 × 47,620.92
  4. Step 4: Simplify right side
    87,907.28x = 5,777,002,380.90
  5. Step 5: Solve for x
    x = 5,777,002,380.90/87,907.28
  6. Step 6: Final answer
    x = 65,717.00

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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.