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Finding the Fourth Proportional to 108,707.45, 150,017.82 and 65,680.97

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Solution

The fourth proportional to 108,707.45, 150,017.82 and 65,680.97 is: 90,640.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,707.45 : 150,017.82 = 65,680.97 : x
  2. Step 2: Convert to fraction form
    108,707.45/150,017.82 = 65,680.97/x
  3. Step 3: Cross multiply
    108,707.45x = 150,017.82 × 65,680.97
  4. Step 4: Simplify right side
    108,707.45x = 9,853,315,184.80
  5. Step 5: Solve for x
    x = 9,853,315,184.80/108,707.45
  6. Step 6: Final answer
    x = 90,640.67

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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.