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Finding the Fourth Proportional to 91,789.71, 137,681.09 and 25,228.11

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Solution

The fourth proportional to 91,789.71, 137,681.09 and 25,228.11 is: 37,841.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,789.71 : 137,681.09 = 25,228.11 : x
  2. Step 2: Convert to fraction form
    91,789.71/137,681.09 = 25,228.11/x
  3. Step 3: Cross multiply
    91,789.71x = 137,681.09 × 25,228.11
  4. Step 4: Simplify right side
    91,789.71x = 3,473,433,464.71
  5. Step 5: Solve for x
    x = 3,473,433,464.71/91,789.71
  6. Step 6: Final answer
    x = 37,841.21

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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.