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Finding the Fourth Proportional to 108,708.20, 163,013.70 and 42,126.20

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Solution

The fourth proportional to 108,708.20, 163,013.70 and 42,126.20 is: 63,170.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,708.20 : 163,013.70 = 42,126.20 : x
  2. Step 2: Convert to fraction form
    108,708.20/163,013.70 = 42,126.20/x
  3. Step 3: Cross multiply
    108,708.20x = 163,013.70 × 42,126.20
  4. Step 4: Simplify right side
    108,708.20x = 6,867,147,728.94
  5. Step 5: Solve for x
    x = 6,867,147,728.94/108,708.20
  6. Step 6: Final answer
    x = 63,170.47

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1.5x scale

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.