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Finding the Fourth Proportional to 85,603.68, 128,288.88 and 41,227.20

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Solution

The fourth proportional to 85,603.68, 128,288.88 and 41,227.20 is: 61,784.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,603.68 : 128,288.88 = 41,227.20 : x
  2. Step 2: Convert to fraction form
    85,603.68/128,288.88 = 41,227.20/x
  3. Step 3: Cross multiply
    85,603.68x = 128,288.88 × 41,227.20
  4. Step 4: Simplify right side
    85,603.68x = 5,288,991,313.54
  5. Step 5: Solve for x
    x = 5,288,991,313.54/85,603.68
  6. Step 6: Final answer
    x = 61,784.63

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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.