Home / 100,220.60-138,306.66-57,199.23

Finding the Fourth Proportional to 100,220.60, 138,306.66 and 57,199.23

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Solution

The fourth proportional to 100,220.60, 138,306.66 and 57,199.23 is: 78,936.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,220.60 : 138,306.66 = 57,199.23 : x
  2. Step 2: Convert to fraction form
    100,220.60/138,306.66 = 57,199.23/x
  3. Step 3: Cross multiply
    100,220.60x = 138,306.66 × 57,199.23
  4. Step 4: Simplify right side
    100,220.60x = 7,911,035,015.73
  5. Step 5: Solve for x
    x = 7,911,035,015.73/100,220.60
  6. Step 6: Final answer
    x = 78,936.21

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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.