Home / 128,125.11-192,188.03-75,462.15

Finding the Fourth Proportional to 128,125.11, 192,188.03 and 75,462.15

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Solution

The fourth proportional to 128,125.11, 192,188.03 and 75,462.15 is: 113,193.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,125.11 : 192,188.03 = 75,462.15 : x
  2. Step 2: Convert to fraction form
    128,125.11/192,188.03 = 75,462.15/x
  3. Step 3: Cross multiply
    128,125.11x = 192,188.03 × 75,462.15
  4. Step 4: Simplify right side
    128,125.11x = 14,502,921,570.75
  5. Step 5: Solve for x
    x = 14,502,921,570.75/128,125.11
  6. Step 6: Final answer
    x = 113,193.44

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1.5x scale

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.