Home / 129,895.71-179,236.86-78,881.91

Finding the Fourth Proportional to 129,895.71, 179,236.86 and 78,881.91

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Solution

The fourth proportional to 129,895.71, 179,236.86 and 78,881.91 is: 108,845.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,895.71 : 179,236.86 = 78,881.91 : x
  2. Step 2: Convert to fraction form
    129,895.71/179,236.86 = 78,881.91/x
  3. Step 3: Cross multiply
    129,895.71x = 179,236.86 × 78,881.91
  4. Step 4: Simplify right side
    129,895.71x = 14,138,545,859.20
  5. Step 5: Solve for x
    x = 14,138,545,859.20/129,895.71
  6. Step 6: Final answer
    x = 108,845.36

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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.