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Finding the Fourth Proportional to 82,908.74, 124,315.72 and 75,855.66

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Solution

The fourth proportional to 82,908.74, 124,315.72 and 75,855.66 is: 113,740.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,908.74 : 124,315.72 = 75,855.66 : x
  2. Step 2: Convert to fraction form
    82,908.74/124,315.72 = 75,855.66/x
  3. Step 3: Cross multiply
    82,908.74x = 124,315.72 × 75,855.66
  4. Step 4: Simplify right side
    82,908.74x = 9,430,050,988.98
  5. Step 5: Solve for x
    x = 9,430,050,988.98/82,908.74
  6. Step 6: Final answer
    x = 113,740.13

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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.