Home / 100,623.28-138,861.40-55,306.20

Finding the Fourth Proportional to 100,623.28, 138,861.40 and 55,306.20

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Solution

The fourth proportional to 100,623.28, 138,861.40 and 55,306.20 is: 76,323.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,623.28 : 138,861.40 = 55,306.20 : x
  2. Step 2: Convert to fraction form
    100,623.28/138,861.40 = 55,306.20/x
  3. Step 3: Cross multiply
    100,623.28x = 138,861.40 × 55,306.20
  4. Step 4: Simplify right side
    100,623.28x = 7,679,896,360.68
  5. Step 5: Solve for x
    x = 7,679,896,360.68/100,623.28
  6. Step 6: Final answer
    x = 76,323.26

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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.