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Finding the Fourth Proportional to 91,130.38, 136,728.38 and 31,975.27

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Solution

The fourth proportional to 91,130.38, 136,728.38 and 31,975.27 is: 47,974.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,130.38 : 136,728.38 = 31,975.27 : x
  2. Step 2: Convert to fraction form
    91,130.38/136,728.38 = 31,975.27/x
  3. Step 3: Cross multiply
    91,130.38x = 136,728.38 × 31,975.27
  4. Step 4: Simplify right side
    91,130.38x = 4,371,926,605.28
  5. Step 5: Solve for x
    x = 4,371,926,605.28/91,130.38
  6. Step 6: Final answer
    x = 47,974.42

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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.