Home / 115,205.60-172,808.40-112,872.80

Finding the Fourth Proportional to 115,205.60, 172,808.40 and 112,872.80

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Solution

The fourth proportional to 115,205.60, 172,808.40 and 112,872.80 is: 169,309.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,205.60 : 172,808.40 = 112,872.80 : x
  2. Step 2: Convert to fraction form
    115,205.60/172,808.40 = 112,872.80/x
  3. Step 3: Cross multiply
    115,205.60x = 172,808.40 × 112,872.80
  4. Step 4: Simplify right side
    115,205.60x = 19,505,367,971.52
  5. Step 5: Solve for x
    x = 19,505,367,971.52/115,205.60
  6. Step 6: Final answer
    x = 169,309.20

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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.