Home / 115,061.80-172,395.60-91,442.20

Finding the Fourth Proportional to 115,061.80, 172,395.60 and 91,442.20

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Solution

The fourth proportional to 115,061.80, 172,395.60 and 91,442.20 is: 137,006.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,061.80 : 172,395.60 = 91,442.20 : x
  2. Step 2: Convert to fraction form
    115,061.80/172,395.60 = 91,442.20/x
  3. Step 3: Cross multiply
    115,061.80x = 172,395.60 × 91,442.20
  4. Step 4: Simplify right side
    115,061.80x = 15,764,232,934.32
  5. Step 5: Solve for x
    x = 15,764,232,934.32/115,061.80
  6. Step 6: Final answer
    x = 137,006.66

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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.