Home / 115,148.57-172,704.03-81,767.66

Finding the Fourth Proportional to 115,148.57, 172,704.03 and 81,767.66

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Solution

The fourth proportional to 115,148.57, 172,704.03 and 81,767.66 is: 122,638.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,148.57 : 172,704.03 = 81,767.66 : x
  2. Step 2: Convert to fraction form
    115,148.57/172,704.03 = 81,767.66/x
  3. Step 3: Cross multiply
    115,148.57x = 172,704.03 × 81,767.66
  4. Step 4: Simplify right side
    115,148.57x = 14,121,604,405.67
  5. Step 5: Solve for x
    x = 14,121,604,405.67/115,148.57
  6. Step 6: Final answer
    x = 122,638.12

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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.