Home / 128,529.60-192,794.40-91,131.90

Finding the Fourth Proportional to 128,529.60, 192,794.40 and 91,131.90

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Solution

The fourth proportional to 128,529.60, 192,794.40 and 91,131.90 is: 136,697.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,529.60 : 192,794.40 = 91,131.90 : x
  2. Step 2: Convert to fraction form
    128,529.60/192,794.40 = 91,131.90/x
  3. Step 3: Cross multiply
    128,529.60x = 192,794.40 × 91,131.90
  4. Step 4: Simplify right side
    128,529.60x = 17,569,719,981.36
  5. Step 5: Solve for x
    x = 17,569,719,981.36/128,529.60
  6. Step 6: Final answer
    x = 136,697.85

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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.