Home / 87,644.45-121,153.65-78,178.15

Finding the Fourth Proportional to 87,644.45, 121,153.65 and 78,178.15

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Solution

The fourth proportional to 87,644.45, 121,153.65 and 78,178.15 is: 108,068.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,644.45 : 121,153.65 = 78,178.15 : x
  2. Step 2: Convert to fraction form
    87,644.45/121,153.65 = 78,178.15/x
  3. Step 3: Cross multiply
    87,644.45x = 121,153.65 × 78,178.15
  4. Step 4: Simplify right side
    87,644.45x = 9,471,568,970.24
  5. Step 5: Solve for x
    x = 9,471,568,970.24/87,644.45
  6. Step 6: Final answer
    x = 108,068.10

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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.