Home / 86,117.10-129,131.36-38,691.54

Finding the Fourth Proportional to 86,117.10, 129,131.36 and 38,691.54

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Solution

The fourth proportional to 86,117.10, 129,131.36 and 38,691.54 is: 58,017.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,117.10 : 129,131.36 = 38,691.54 : x
  2. Step 2: Convert to fraction form
    86,117.10/129,131.36 = 38,691.54/x
  3. Step 3: Cross multiply
    86,117.10x = 129,131.36 × 38,691.54
  4. Step 4: Simplify right side
    86,117.10x = 4,996,291,180.69
  5. Step 5: Solve for x
    x = 4,996,291,180.69/86,117.10
  6. Step 6: Final answer
    x = 58,017.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.