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Finding the Fourth Proportional to 91,167.98, 136,747.01 and 27,988.11

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Solution

The fourth proportional to 91,167.98, 136,747.01 and 27,988.11 is: 41,980.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,167.98 : 136,747.01 = 27,988.11 : x
  2. Step 2: Convert to fraction form
    91,167.98/136,747.01 = 27,988.11/x
  3. Step 3: Cross multiply
    91,167.98x = 136,747.01 × 27,988.11
  4. Step 4: Simplify right side
    91,167.98x = 3,827,290,358.05
  5. Step 5: Solve for x
    x = 3,827,290,358.05/91,167.98
  6. Step 6: Final answer
    x = 41,980.64

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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.