Home / 87,128.64-120,305.25-66,953.70

Finding the Fourth Proportional to 87,128.64, 120,305.25 and 66,953.70

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Solution

The fourth proportional to 87,128.64, 120,305.25 and 66,953.70 is: 92,448.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,128.64 : 120,305.25 = 66,953.70 : x
  2. Step 2: Convert to fraction form
    87,128.64/120,305.25 = 66,953.70/x
  3. Step 3: Cross multiply
    87,128.64x = 120,305.25 × 66,953.70
  4. Step 4: Simplify right side
    87,128.64x = 8,054,881,616.93
  5. Step 5: Solve for x
    x = 8,054,881,616.93/87,128.64
  6. Step 6: Final answer
    x = 92,448.15

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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.