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Finding the Fourth Proportional to 45,386, 68,079.48 and 12,554

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Solution

The fourth proportional to 45,386, 68,079.48 and 12,554 is: 18,831.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,386 : 68,079.48 = 12,554 : x
  2. Step 2: Convert to fraction form
    45,386/68,079.48 = 12,554/x
  3. Step 3: Cross multiply
    45,386x = 68,079.48 × 12,554
  4. Step 4: Simplify right side
    45,386x = 854,669,791.92
  5. Step 5: Solve for x
    x = 854,669,791.92/45,386
  6. Step 6: Final answer
    x = 18,831.13

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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.