Home / 100,627.43-138,869.19-55,307.03

Finding the Fourth Proportional to 100,627.43, 138,869.19 and 55,307.03

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Solution

The fourth proportional to 100,627.43, 138,869.19 and 55,307.03 is: 76,325.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,627.43 : 138,869.19 = 55,307.03 : x
  2. Step 2: Convert to fraction form
    100,627.43/138,869.19 = 55,307.03/x
  3. Step 3: Cross multiply
    100,627.43x = 138,869.19 × 55,307.03
  4. Step 4: Simplify right side
    100,627.43x = 7,680,442,180.87
  5. Step 5: Solve for x
    x = 7,680,442,180.87/100,627.43
  6. Step 6: Final answer
    x = 76,325.53

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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.