Home / 128,217.39-192,154.16-99,788.66

Finding the Fourth Proportional to 128,217.39, 192,154.16 and 99,788.66

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Solution

The fourth proportional to 128,217.39, 192,154.16 and 99,788.66 is: 149,549.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,217.39 : 192,154.16 = 99,788.66 : x
  2. Step 2: Convert to fraction form
    128,217.39/192,154.16 = 99,788.66/x
  3. Step 3: Cross multiply
    128,217.39x = 192,154.16 × 99,788.66
  4. Step 4: Simplify right side
    128,217.39x = 19,174,806,370.74
  5. Step 5: Solve for x
    x = 19,174,806,370.74/128,217.39
  6. Step 6: Final answer
    x = 149,549.19

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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.