Home / 115,146.57-172,701.03-81,765.66

Finding the Fourth Proportional to 115,146.57, 172,701.03 and 81,765.66

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Solution

The fourth proportional to 115,146.57, 172,701.03 and 81,765.66 is: 122,635.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,146.57 : 172,701.03 = 81,765.66 : x
  2. Step 2: Convert to fraction form
    115,146.57/172,701.03 = 81,765.66/x
  3. Step 3: Cross multiply
    115,146.57x = 172,701.03 × 81,765.66
  4. Step 4: Simplify right side
    115,146.57x = 14,121,013,700.63
  5. Step 5: Solve for x
    x = 14,121,013,700.63/115,146.57
  6. Step 6: Final answer
    x = 122,635.12

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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.