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Finding the Fourth Proportional to 85,288.60, 127,932.90 and 47,963.80

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Solution

The fourth proportional to 85,288.60, 127,932.90 and 47,963.80 is: 71,945.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,288.60 : 127,932.90 = 47,963.80 : x
  2. Step 2: Convert to fraction form
    85,288.60/127,932.90 = 47,963.80/x
  3. Step 3: Cross multiply
    85,288.60x = 127,932.90 × 47,963.80
  4. Step 4: Simplify right side
    85,288.60x = 6,136,148,029.02
  5. Step 5: Solve for x
    x = 6,136,148,029.02/85,288.60
  6. Step 6: Final answer
    x = 71,945.70

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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.