Home / 90,665.20-136,042.36-40,780.56

Finding the Fourth Proportional to 90,665.20, 136,042.36 and 40,780.56

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Solution

The fourth proportional to 90,665.20, 136,042.36 and 40,780.56 is: 61,190.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,665.20 : 136,042.36 = 40,780.56 : x
  2. Step 2: Convert to fraction form
    90,665.20/136,042.36 = 40,780.56/x
  3. Step 3: Cross multiply
    90,665.20x = 136,042.36 × 40,780.56
  4. Step 4: Simplify right side
    90,665.20x = 5,547,883,624.52
  5. Step 5: Solve for x
    x = 5,547,883,624.52/90,665.20
  6. Step 6: Final answer
    x = 61,190.88

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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.