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Finding the Fourth Proportional to 153,687.91, 212,040.97 and 92,406.55

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Solution

The fourth proportional to 153,687.91, 212,040.97 and 92,406.55 is: 127,491.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,687.91 : 212,040.97 = 92,406.55 : x
  2. Step 2: Convert to fraction form
    153,687.91/212,040.97 = 92,406.55/x
  3. Step 3: Cross multiply
    153,687.91x = 212,040.97 × 92,406.55
  4. Step 4: Simplify right side
    153,687.91x = 19,593,974,496.35
  5. Step 5: Solve for x
    x = 19,593,974,496.35/153,687.91
  6. Step 6: Final answer
    x = 127,491.97

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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.