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Finding the Fourth Proportional to 128,412.93, 192,493.02 and 75,037.17

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Solution

The fourth proportional to 128,412.93, 192,493.02 and 75,037.17 is: 112,481.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,412.93 : 192,493.02 = 75,037.17 : x
  2. Step 2: Convert to fraction form
    128,412.93/192,493.02 = 75,037.17/x
  3. Step 3: Cross multiply
    128,412.93x = 192,493.02 × 75,037.17
  4. Step 4: Simplify right side
    128,412.93x = 14,444,131,465.55
  5. Step 5: Solve for x
    x = 14,444,131,465.55/128,412.93
  6. Step 6: Final answer
    x = 112,481.91

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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.