Home / 128,135.28-192,238-61,631.04

Finding the Fourth Proportional to 128,135.28, 192,238 and 61,631.04

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Solution

The fourth proportional to 128,135.28, 192,238 and 61,631.04 is: 92,463.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,135.28 : 192,238 = 61,631.04 : x
  2. Step 2: Convert to fraction form
    128,135.28/192,238 = 61,631.04/x
  3. Step 3: Cross multiply
    128,135.28x = 192,238 × 61,631.04
  4. Step 4: Simplify right side
    128,135.28x = 11,847,827,867.52
  5. Step 5: Solve for x
    x = 11,847,827,867.52/128,135.28
  6. Step 6: Final answer
    x = 92,463.43

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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.