Home / 154,808.28-213,435-100,263.42

Finding the Fourth Proportional to 154,808.28, 213,435 and 100,263.42

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Solution

The fourth proportional to 154,808.28, 213,435 and 100,263.42 is: 138,233.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,808.28 : 213,435 = 100,263.42 : x
  2. Step 2: Convert to fraction form
    154,808.28/213,435 = 100,263.42/x
  3. Step 3: Cross multiply
    154,808.28x = 213,435 × 100,263.42
  4. Step 4: Simplify right side
    154,808.28x = 21,399,723,047.70
  5. Step 5: Solve for x
    x = 21,399,723,047.70/154,808.28
  6. Step 6: Final answer
    x = 138,233.71

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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.