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Finding the Fourth Proportional to 91,899.20, 137,872.80 and 29,571.20

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Solution

The fourth proportional to 91,899.20, 137,872.80 and 29,571.20 is: 44,364.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,899.20 : 137,872.80 = 29,571.20 : x
  2. Step 2: Convert to fraction form
    91,899.20/137,872.80 = 29,571.20/x
  3. Step 3: Cross multiply
    91,899.20x = 137,872.80 × 29,571.20
  4. Step 4: Simplify right side
    91,899.20x = 4,077,064,143.36
  5. Step 5: Solve for x
    x = 4,077,064,143.36/91,899.20
  6. Step 6: Final answer
    x = 44,364.52

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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.