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Finding the Fourth Proportional to 124,769.40, 187,162.20 and 65,720.40

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Solution

The fourth proportional to 124,769.40, 187,162.20 and 65,720.40 is: 98,584.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,769.40 : 187,162.20 = 65,720.40 : x
  2. Step 2: Convert to fraction form
    124,769.40/187,162.20 = 65,720.40/x
  3. Step 3: Cross multiply
    124,769.40x = 187,162.20 × 65,720.40
  4. Step 4: Simplify right side
    124,769.40x = 12,300,374,648.88
  5. Step 5: Solve for x
    x = 12,300,374,648.88/124,769.40
  6. Step 6: Final answer
    x = 98,584.87

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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.