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Finding the Fourth Proportional to 85,136.80, 127,532.40 and 48,157.60

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Solution

The fourth proportional to 85,136.80, 127,532.40 and 48,157.60 is: 72,138.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,136.80 : 127,532.40 = 48,157.60 : x
  2. Step 2: Convert to fraction form
    85,136.80/127,532.40 = 48,157.60/x
  3. Step 3: Cross multiply
    85,136.80x = 127,532.40 × 48,157.60
  4. Step 4: Simplify right side
    85,136.80x = 6,141,654,306.24
  5. Step 5: Solve for x
    x = 6,141,654,306.24/85,136.80
  6. Step 6: Final answer
    x = 72,138.66

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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.