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Finding the Fourth Proportional to 49,280.72, 68,008 and 28,060

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Solution

The fourth proportional to 49,280.72, 68,008 and 28,060 is: 38,723.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,280.72 : 68,008 = 28,060 : x
  2. Step 2: Convert to fraction form
    49,280.72/68,008 = 28,060/x
  3. Step 3: Cross multiply
    49,280.72x = 68,008 × 28,060
  4. Step 4: Simplify right side
    49,280.72x = 1,908,304,480
  5. Step 5: Solve for x
    x = 1,908,304,480/49,280.72
  6. Step 6: Final answer
    x = 38,723.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.