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Finding the Fourth Proportional to 128,167.29, 192,289.88 and 90,799.65

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Solution

The fourth proportional to 128,167.29, 192,289.88 and 90,799.65 is: 136,227.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,167.29 : 192,289.88 = 90,799.65 : x
  2. Step 2: Convert to fraction form
    128,167.29/192,289.88 = 90,799.65/x
  3. Step 3: Cross multiply
    128,167.29x = 192,289.88 × 90,799.65
  4. Step 4: Simplify right side
    128,167.29x = 17,459,854,029.54
  5. Step 5: Solve for x
    x = 17,459,854,029.54/128,167.29
  6. Step 6: Final answer
    x = 136,227.07

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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.