Home / 115,044.80-172,370.10-91,425.20

Finding the Fourth Proportional to 115,044.80, 172,370.10 and 91,425.20

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Solution

The fourth proportional to 115,044.80, 172,370.10 and 91,425.20 is: 136,981.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,044.80 : 172,370.10 = 91,425.20 : x
  2. Step 2: Convert to fraction form
    115,044.80/172,370.10 = 91,425.20/x
  3. Step 3: Cross multiply
    115,044.80x = 172,370.10 × 91,425.20
  4. Step 4: Simplify right side
    115,044.80x = 15,758,970,866.52
  5. Step 5: Solve for x
    x = 15,758,970,866.52/115,044.80
  6. Step 6: Final answer
    x = 136,981.17

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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.