Home / 128,731.25-193,142.24-57,648.08

Finding the Fourth Proportional to 128,731.25, 193,142.24 and 57,648.08

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Solution

The fourth proportional to 128,731.25, 193,142.24 and 57,648.08 is: 86,492.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,731.25 : 193,142.24 = 57,648.08 : x
  2. Step 2: Convert to fraction form
    128,731.25/193,142.24 = 57,648.08/x
  3. Step 3: Cross multiply
    128,731.25x = 193,142.24 × 57,648.08
  4. Step 4: Simplify right side
    128,731.25x = 11,134,279,302.90
  5. Step 5: Solve for x
    x = 11,134,279,302.90/128,731.25
  6. Step 6: Final answer
    x = 86,492.44

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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.