Home / 85,458.20-128,187.30-75,616.70

Finding the Fourth Proportional to 85,458.20, 128,187.30 and 75,616.70

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Solution

The fourth proportional to 85,458.20, 128,187.30 and 75,616.70 is: 113,425.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,458.20 : 128,187.30 = 75,616.70 : x
  2. Step 2: Convert to fraction form
    85,458.20/128,187.30 = 75,616.70/x
  3. Step 3: Cross multiply
    85,458.20x = 128,187.30 × 75,616.70
  4. Step 4: Simplify right side
    85,458.20x = 9,693,100,607.91
  5. Step 5: Solve for x
    x = 9,693,100,607.91/85,458.20
  6. Step 6: Final answer
    x = 113,425.05

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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.