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Finding the Fourth Proportional to 108,909.20, 163,368.60 and 61,523.60

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Solution

The fourth proportional to 108,909.20, 163,368.60 and 61,523.60 is: 92,288.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,909.20 : 163,368.60 = 61,523.60 : x
  2. Step 2: Convert to fraction form
    108,909.20/163,368.60 = 61,523.60/x
  3. Step 3: Cross multiply
    108,909.20x = 163,368.60 × 61,523.60
  4. Step 4: Simplify right side
    108,909.20x = 10,051,024,398.96
  5. Step 5: Solve for x
    x = 10,051,024,398.96/108,909.20
  6. Step 6: Final answer
    x = 92,288.11

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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.