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Finding the Fourth Proportional to 138,974.80, 208,170.60 and 124,200.40

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Solution

The fourth proportional to 138,974.80, 208,170.60 and 124,200.40 is: 186,040.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,974.80 : 208,170.60 = 124,200.40 : x
  2. Step 2: Convert to fraction form
    138,974.80/208,170.60 = 124,200.40/x
  3. Step 3: Cross multiply
    138,974.80x = 208,170.60 × 124,200.40
  4. Step 4: Simplify right side
    138,974.80x = 25,854,871,788.24
  5. Step 5: Solve for x
    x = 25,854,871,788.24/138,974.80
  6. Step 6: Final answer
    x = 186,040.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.