Home / 85,458.20-128,220.12-60,181.97

Finding the Fourth Proportional to 85,458.20, 128,220.12 and 60,181.97

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Solution

The fourth proportional to 85,458.20, 128,220.12 and 60,181.97 is: 90,296.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,458.20 : 128,220.12 = 60,181.97 : x
  2. Step 2: Convert to fraction form
    85,458.20/128,220.12 = 60,181.97/x
  3. Step 3: Cross multiply
    85,458.20x = 128,220.12 × 60,181.97
  4. Step 4: Simplify right side
    85,458.20x = 7,716,538,774.14
  5. Step 5: Solve for x
    x = 7,716,538,774.14/85,458.20
  6. Step 6: Final answer
    x = 90,296.07

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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.