Home / 87,690.24-121,003.20-51,881.76

Finding the Fourth Proportional to 87,690.24, 121,003.20 and 51,881.76

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Solution

The fourth proportional to 87,690.24, 121,003.20 and 51,881.76 is: 71,591.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,690.24 : 121,003.20 = 51,881.76 : x
  2. Step 2: Convert to fraction form
    87,690.24/121,003.20 = 51,881.76/x
  3. Step 3: Cross multiply
    87,690.24x = 121,003.20 × 51,881.76
  4. Step 4: Simplify right side
    87,690.24x = 6,277,858,981.63
  5. Step 5: Solve for x
    x = 6,277,858,981.63/87,690.24
  6. Step 6: Final answer
    x = 71,591.31

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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.