Home / 90,891.05-136,124.96-87,738.12

Finding the Fourth Proportional to 90,891.05, 136,124.96 and 87,738.12

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Solution

The fourth proportional to 90,891.05, 136,124.96 and 87,738.12 is: 131,402.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,891.05 : 136,124.96 = 87,738.12 : x
  2. Step 2: Convert to fraction form
    90,891.05/136,124.96 = 87,738.12/x
  3. Step 3: Cross multiply
    90,891.05x = 136,124.96 × 87,738.12
  4. Step 4: Simplify right side
    90,891.05x = 11,943,347,636.78
  5. Step 5: Solve for x
    x = 11,943,347,636.78/90,891.05
  6. Step 6: Final answer
    x = 131,402.91

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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.