Home / 86,218.88-129,282.14-38,143.76

Finding the Fourth Proportional to 86,218.88, 129,282.14 and 38,143.76

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Solution

The fourth proportional to 86,218.88, 129,282.14 and 38,143.76 is: 57,195.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,218.88 : 129,282.14 = 38,143.76 : x
  2. Step 2: Convert to fraction form
    86,218.88/129,282.14 = 38,143.76/x
  3. Step 3: Cross multiply
    86,218.88x = 129,282.14 × 38,143.76
  4. Step 4: Simplify right side
    86,218.88x = 4,931,306,920.45
  5. Step 5: Solve for x
    x = 4,931,306,920.45/86,218.88
  6. Step 6: Final answer
    x = 57,195.21

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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.