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Finding the Fourth Proportional to 85,301.52, 127,915.09 and 45,311.74

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Solution

The fourth proportional to 85,301.52, 127,915.09 and 45,311.74 is: 67,947.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,301.52 : 127,915.09 = 45,311.74 : x
  2. Step 2: Convert to fraction form
    85,301.52/127,915.09 = 45,311.74/x
  3. Step 3: Cross multiply
    85,301.52x = 127,915.09 × 45,311.74
  4. Step 4: Simplify right side
    85,301.52x = 5,796,055,300.16
  5. Step 5: Solve for x
    x = 5,796,055,300.16/85,301.52
  6. Step 6: Final answer
    x = 67,947.85

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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.