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Finding the Fourth Proportional to 125,187, 172,758.06 and 72,195

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Solution

The fourth proportional to 125,187, 172,758.06 and 72,195 is: 99,629.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,187 : 172,758.06 = 72,195 : x
  2. Step 2: Convert to fraction form
    125,187/172,758.06 = 72,195/x
  3. Step 3: Cross multiply
    125,187x = 172,758.06 × 72,195
  4. Step 4: Simplify right side
    125,187x = 12,472,268,141.70
  5. Step 5: Solve for x
    x = 12,472,268,141.70/125,187
  6. Step 6: Final answer
    x = 99,629.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.