Home / 115,147.57-172,702.53-81,766.66

Finding the Fourth Proportional to 115,147.57, 172,702.53 and 81,766.66

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Solution

The fourth proportional to 115,147.57, 172,702.53 and 81,766.66 is: 122,636.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,147.57 : 172,702.53 = 81,766.66 : x
  2. Step 2: Convert to fraction form
    115,147.57/172,702.53 = 81,766.66/x
  3. Step 3: Cross multiply
    115,147.57x = 172,702.53 × 81,766.66
  4. Step 4: Simplify right side
    115,147.57x = 14,121,309,051.65
  5. Step 5: Solve for x
    x = 14,121,309,051.65/115,147.57
  6. Step 6: Final answer
    x = 122,636.62

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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.