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Finding the Fourth Proportional to 108,704.20, 163,007.70 and 42,122.20

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Solution

The fourth proportional to 108,704.20, 163,007.70 and 42,122.20 is: 63,164.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,704.20 : 163,007.70 = 42,122.20 : x
  2. Step 2: Convert to fraction form
    108,704.20/163,007.70 = 42,122.20/x
  3. Step 3: Cross multiply
    108,704.20x = 163,007.70 × 42,122.20
  4. Step 4: Simplify right side
    108,704.20x = 6,866,242,940.94
  5. Step 5: Solve for x
    x = 6,866,242,940.94/108,704.20
  6. Step 6: Final answer
    x = 63,164.47

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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.