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Finding the Fourth Proportional to 91,999.90, 137,924.43 and 47,639.29

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Solution

The fourth proportional to 91,999.90, 137,924.43 and 47,639.29 is: 71,419.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,999.90 : 137,924.43 = 47,639.29 : x
  2. Step 2: Convert to fraction form
    91,999.90/137,924.43 = 47,639.29/x
  3. Step 3: Cross multiply
    91,999.90x = 137,924.43 × 47,639.29
  4. Step 4: Simplify right side
    91,999.90x = 6,570,621,918.85
  5. Step 5: Solve for x
    x = 6,570,621,918.85/91,999.90
  6. Step 6: Final answer
    x = 71,419.88

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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.