Home / 100,100.13-138,136.98-54,777.96

Finding the Fourth Proportional to 100,100.13, 138,136.98 and 54,777.96

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Solution

The fourth proportional to 100,100.13, 138,136.98 and 54,777.96 is: 75,592.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,100.13 : 138,136.98 = 54,777.96 : x
  2. Step 2: Convert to fraction form
    100,100.13/138,136.98 = 54,777.96/x
  3. Step 3: Cross multiply
    100,100.13x = 138,136.98 × 54,777.96
  4. Step 4: Simplify right side
    100,100.13x = 7,566,861,964.96
  5. Step 5: Solve for x
    x = 7,566,861,964.96/100,100.13
  6. Step 6: Final answer
    x = 75,592.93

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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.