Home / 87,931.78-121,346.21-47,645.43

Finding the Fourth Proportional to 87,931.78, 121,346.21 and 47,645.43

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Solution

The fourth proportional to 87,931.78, 121,346.21 and 47,645.43 is: 65,750.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,931.78 : 121,346.21 = 47,645.43 : x
  2. Step 2: Convert to fraction form
    87,931.78/121,346.21 = 47,645.43/x
  3. Step 3: Cross multiply
    87,931.78x = 121,346.21 × 47,645.43
  4. Step 4: Simplify right side
    87,931.78x = 5,781,592,354.32
  5. Step 5: Solve for x
    x = 5,781,592,354.32/87,931.78
  6. Step 6: Final answer
    x = 65,750.88

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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.