Home / 100,340.13-138,470.99-55,022.25

Finding the Fourth Proportional to 100,340.13, 138,470.99 and 55,022.25

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Solution

The fourth proportional to 100,340.13, 138,470.99 and 55,022.25 is: 75,931.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,340.13 : 138,470.99 = 55,022.25 : x
  2. Step 2: Convert to fraction form
    100,340.13/138,470.99 = 55,022.25/x
  3. Step 3: Cross multiply
    100,340.13x = 138,470.99 × 55,022.25
  4. Step 4: Simplify right side
    100,340.13x = 7,618,985,154.42
  5. Step 5: Solve for x
    x = 7,618,985,154.42/100,340.13
  6. Step 6: Final answer
    x = 75,931.59

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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.