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Finding the Fourth Proportional to 86,026.65, 129,035.41 and 26,855.54

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Solution

The fourth proportional to 86,026.65, 129,035.41 and 26,855.54 is: 40,281.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,026.65 : 129,035.41 = 26,855.54 : x
  2. Step 2: Convert to fraction form
    86,026.65/129,035.41 = 26,855.54/x
  3. Step 3: Cross multiply
    86,026.65x = 129,035.41 × 26,855.54
  4. Step 4: Simplify right side
    86,026.65x = 3,465,315,614.67
  5. Step 5: Solve for x
    x = 3,465,315,614.67/86,026.65
  6. Step 6: Final answer
    x = 40,281.88

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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.