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Finding the Fourth Proportional to 128,250.92, 176,894.46 and 90,019.01

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Solution

The fourth proportional to 128,250.92, 176,894.46 and 90,019.01 is: 124,161.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,250.92 : 176,894.46 = 90,019.01 : x
  2. Step 2: Convert to fraction form
    128,250.92/176,894.46 = 90,019.01/x
  3. Step 3: Cross multiply
    128,250.92x = 176,894.46 × 90,019.01
  4. Step 4: Simplify right side
    128,250.92x = 15,923,864,605.92
  5. Step 5: Solve for x
    x = 15,923,864,605.92/128,250.92
  6. Step 6: Final answer
    x = 124,161.79

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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.