Home / 90,511.12-135,772.32-31,338.88

Finding the Fourth Proportional to 90,511.12, 135,772.32 and 31,338.88

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Solution

The fourth proportional to 90,511.12, 135,772.32 and 31,338.88 is: 47,010.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,511.12 : 135,772.32 = 31,338.88 : x
  2. Step 2: Convert to fraction form
    90,511.12/135,772.32 = 31,338.88/x
  3. Step 3: Cross multiply
    90,511.12x = 135,772.32 × 31,338.88
  4. Step 4: Simplify right side
    90,511.12x = 4,254,952,443.80
  5. Step 5: Solve for x
    x = 4,254,952,443.80/90,511.12
  6. Step 6: Final answer
    x = 47,010.27

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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.