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Finding the Fourth Proportional to 86,658.17, 129,986.91 and 27,498.45

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Solution

The fourth proportional to 86,658.17, 129,986.91 and 27,498.45 is: 41,247.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,658.17 : 129,986.91 = 27,498.45 : x
  2. Step 2: Convert to fraction form
    86,658.17/129,986.91 = 27,498.45/x
  3. Step 3: Cross multiply
    86,658.17x = 129,986.91 × 27,498.45
  4. Step 4: Simplify right side
    86,658.17x = 3,574,438,545.29
  5. Step 5: Solve for x
    x = 3,574,438,545.29/86,658.17
  6. Step 6: Final answer
    x = 41,247.56

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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.