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Finding the Fourth Proportional to 82,756.62, 124,061.10 and 68,830.89

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Solution

The fourth proportional to 82,756.62, 124,061.10 and 68,830.89 is: 103,184.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,756.62 : 124,061.10 = 68,830.89 : x
  2. Step 2: Convert to fraction form
    82,756.62/124,061.10 = 68,830.89/x
  3. Step 3: Cross multiply
    82,756.62x = 124,061.10 × 68,830.89
  4. Step 4: Simplify right side
    82,756.62x = 8,539,235,927.38
  5. Step 5: Solve for x
    x = 8,539,235,927.38/82,756.62
  6. Step 6: Final answer
    x = 103,184.93

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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.