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Finding the Fourth Proportional to 85,321.63, 127,882.78 and 64,193.78

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Solution

The fourth proportional to 85,321.63, 127,882.78 and 64,193.78 is: 96,215.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,321.63 : 127,882.78 = 64,193.78 : x
  2. Step 2: Convert to fraction form
    85,321.63/127,882.78 = 64,193.78/x
  3. Step 3: Cross multiply
    85,321.63x = 127,882.78 × 64,193.78
  4. Step 4: Simplify right side
    85,321.63x = 8,209,279,045.11
  5. Step 5: Solve for x
    x = 8,209,279,045.11/85,321.63
  6. Step 6: Final answer
    x = 96,215.68

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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.