Home / 128,528.17-192,456.91-103,431.13

Finding the Fourth Proportional to 128,528.17, 192,456.91 and 103,431.13

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Solution

The fourth proportional to 128,528.17, 192,456.91 and 103,431.13 is: 154,876.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,528.17 : 192,456.91 = 103,431.13 : x
  2. Step 2: Convert to fraction form
    128,528.17/192,456.91 = 103,431.13/x
  3. Step 3: Cross multiply
    128,528.17x = 192,456.91 × 103,431.13
  4. Step 4: Simplify right side
    128,528.17x = 19,906,035,325.75
  5. Step 5: Solve for x
    x = 19,906,035,325.75/128,528.17
  6. Step 6: Final answer
    x = 154,876.83

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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.