Home / 128,292.50-177,043.92-85,952.18

Finding the Fourth Proportional to 128,292.50, 177,043.92 and 85,952.18

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Solution

The fourth proportional to 128,292.50, 177,043.92 and 85,952.18 is: 118,614.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,292.50 : 177,043.92 = 85,952.18 : x
  2. Step 2: Convert to fraction form
    128,292.50/177,043.92 = 85,952.18/x
  3. Step 3: Cross multiply
    128,292.50x = 177,043.92 × 85,952.18
  4. Step 4: Simplify right side
    128,292.50x = 15,217,310,879.75
  5. Step 5: Solve for x
    x = 15,217,310,879.75/128,292.50
  6. Step 6: Final answer
    x = 118,614.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.