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Finding the Fourth Proportional to 108,743.40, 163,115.10 and 79,367.40

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Solution

The fourth proportional to 108,743.40, 163,115.10 and 79,367.40 is: 119,051.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,743.40 : 163,115.10 = 79,367.40 : x
  2. Step 2: Convert to fraction form
    108,743.40/163,115.10 = 79,367.40/x
  3. Step 3: Cross multiply
    108,743.40x = 163,115.10 × 79,367.40
  4. Step 4: Simplify right side
    108,743.40x = 12,946,021,387.74
  5. Step 5: Solve for x
    x = 12,946,021,387.74/108,743.40
  6. Step 6: Final answer
    x = 119,051.10

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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.