Home / 100,623.62-138,851.55-55,301.10

Finding the Fourth Proportional to 100,623.62, 138,851.55 and 55,301.10

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Solution

The fourth proportional to 100,623.62, 138,851.55 and 55,301.10 is: 76,310.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,623.62 : 138,851.55 = 55,301.10 : x
  2. Step 2: Convert to fraction form
    100,623.62/138,851.55 = 55,301.10/x
  3. Step 3: Cross multiply
    100,623.62x = 138,851.55 × 55,301.10
  4. Step 4: Simplify right side
    100,623.62x = 7,678,643,451.71
  5. Step 5: Solve for x
    x = 7,678,643,451.71/100,623.62
  6. Step 6: Final answer
    x = 76,310.55

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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.