Home / 87,081.45-120,061.17-56,400.35

Finding the Fourth Proportional to 87,081.45, 120,061.17 and 56,400.35

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Solution

The fourth proportional to 87,081.45, 120,061.17 and 56,400.35 is: 77,760.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,081.45 : 120,061.17 = 56,400.35 : x
  2. Step 2: Convert to fraction form
    87,081.45/120,061.17 = 56,400.35/x
  3. Step 3: Cross multiply
    87,081.45x = 120,061.17 × 56,400.35
  4. Step 4: Simplify right side
    87,081.45x = 6,771,491,846.51
  5. Step 5: Solve for x
    x = 6,771,491,846.51/87,081.45
  6. Step 6: Final answer
    x = 77,760.44

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1.5x scale

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.