Home / 90,906.20-136,440.30-53,419.40

Finding the Fourth Proportional to 90,906.20, 136,440.30 and 53,419.40

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Solution

The fourth proportional to 90,906.20, 136,440.30 and 53,419.40 is: 80,176.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,906.20 : 136,440.30 = 53,419.40 : x
  2. Step 2: Convert to fraction form
    90,906.20/136,440.30 = 53,419.40/x
  3. Step 3: Cross multiply
    90,906.20x = 136,440.30 × 53,419.40
  4. Step 4: Simplify right side
    90,906.20x = 7,288,558,961.82
  5. Step 5: Solve for x
    x = 7,288,558,961.82/90,906.20
  6. Step 6: Final answer
    x = 80,176.70

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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.