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Finding the Fourth Proportional to 90,670.57, 125,136.90 and 54,860.88

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Solution

The fourth proportional to 90,670.57, 125,136.90 and 54,860.88 is: 75,714.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,670.57 : 125,136.90 = 54,860.88 : x
  2. Step 2: Convert to fraction form
    90,670.57/125,136.90 = 54,860.88/x
  3. Step 3: Cross multiply
    90,670.57x = 125,136.90 × 54,860.88
  4. Step 4: Simplify right side
    90,670.57x = 6,865,120,454.47
  5. Step 5: Solve for x
    x = 6,865,120,454.47/90,670.57
  6. Step 6: Final answer
    x = 75,714.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.