Home / 100,302.22-138,389.07-79,015.42

Finding the Fourth Proportional to 100,302.22, 138,389.07 and 79,015.42

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Solution

The fourth proportional to 100,302.22, 138,389.07 and 79,015.42 is: 109,019.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,302.22 : 138,389.07 = 79,015.42 : x
  2. Step 2: Convert to fraction form
    100,302.22/138,389.07 = 79,015.42/x
  3. Step 3: Cross multiply
    100,302.22x = 138,389.07 × 79,015.42
  4. Step 4: Simplify right side
    100,302.22x = 10,934,870,489.46
  5. Step 5: Solve for x
    x = 10,934,870,489.46/100,302.22
  6. Step 6: Final answer
    x = 109,019.23

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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.