Home / 98,638.20-148,115.70-91,361.40

Finding the Fourth Proportional to 98,638.20, 148,115.70 and 91,361.40

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Solution

The fourth proportional to 98,638.20, 148,115.70 and 91,361.40 is: 137,188.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,638.20 : 148,115.70 = 91,361.40 : x
  2. Step 2: Convert to fraction form
    98,638.20/148,115.70 = 91,361.40/x
  3. Step 3: Cross multiply
    98,638.20x = 148,115.70 × 91,361.40
  4. Step 4: Simplify right side
    98,638.20x = 13,532,057,713.98
  5. Step 5: Solve for x
    x = 13,532,057,713.98/98,638.20
  6. Step 6: Final answer
    x = 137,188.81

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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.