Home / 87,719.72-121,044.14-64,761.76

Finding the Fourth Proportional to 87,719.72, 121,044.14 and 64,761.76

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Solution

The fourth proportional to 87,719.72, 121,044.14 and 64,761.76 is: 89,364.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,719.72 : 121,044.14 = 64,761.76 : x
  2. Step 2: Convert to fraction form
    87,719.72/121,044.14 = 64,761.76/x
  3. Step 3: Cross multiply
    87,719.72x = 121,044.14 × 64,761.76
  4. Step 4: Simplify right side
    87,719.72x = 7,839,030,917.67
  5. Step 5: Solve for x
    x = 7,839,030,917.67/87,719.72
  6. Step 6: Final answer
    x = 89,364.52

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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.