Home / 87,128.29-120,192.69-56,931.25

Finding the Fourth Proportional to 87,128.29, 120,192.69 and 56,931.25

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Solution

The fourth proportional to 87,128.29, 120,192.69 and 56,931.25 is: 78,536.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,128.29 : 120,192.69 = 56,931.25 : x
  2. Step 2: Convert to fraction form
    87,128.29/120,192.69 = 56,931.25/x
  3. Step 3: Cross multiply
    87,128.29x = 120,192.69 × 56,931.25
  4. Step 4: Simplify right side
    87,128.29x = 6,842,720,082.56
  5. Step 5: Solve for x
    x = 6,842,720,082.56/87,128.29
  6. Step 6: Final answer
    x = 78,536.15

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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.