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Finding the Fourth Proportional to 91,438.80, 137,112.84 and 29,101.20

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Solution

The fourth proportional to 91,438.80, 137,112.84 and 29,101.20 is: 43,637.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,438.80 : 137,112.84 = 29,101.20 : x
  2. Step 2: Convert to fraction form
    91,438.80/137,112.84 = 29,101.20/x
  3. Step 3: Cross multiply
    91,438.80x = 137,112.84 × 29,101.20
  4. Step 4: Simplify right side
    91,438.80x = 3,990,148,179.41
  5. Step 5: Solve for x
    x = 3,990,148,179.41/91,438.80
  6. Step 6: Final answer
    x = 43,637.36

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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.