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Finding the Fourth Proportional to 115,191.90, 158,965.56 and 64,207.87

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Solution

The fourth proportional to 115,191.90, 158,965.56 and 64,207.87 is: 88,607.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,191.90 : 158,965.56 = 64,207.87 : x
  2. Step 2: Convert to fraction form
    115,191.90/158,965.56 = 64,207.87/x
  3. Step 3: Cross multiply
    115,191.90x = 158,965.56 × 64,207.87
  4. Step 4: Simplify right side
    115,191.90x = 10,206,839,216.13
  5. Step 5: Solve for x
    x = 10,206,839,216.13/115,191.90
  6. Step 6: Final answer
    x = 88,607.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.