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Finding the Fourth Proportional to 115,116.65, 158,858.58 and 64,129.31

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Solution

The fourth proportional to 115,116.65, 158,858.58 and 64,129.31 is: 88,497.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,116.65 : 158,858.58 = 64,129.31 : x
  2. Step 2: Convert to fraction form
    115,116.65/158,858.58 = 64,129.31/x
  3. Step 3: Cross multiply
    115,116.65x = 158,858.58 × 64,129.31
  4. Step 4: Simplify right side
    115,116.65x = 10,187,491,122.98
  5. Step 5: Solve for x
    x = 10,187,491,122.98/115,116.65
  6. Step 6: Final answer
    x = 88,497.11

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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.