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Finding the Fourth Proportional to 108,742.20, 162,854.10 and 66,751.80

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Solution

The fourth proportional to 108,742.20, 162,854.10 and 66,751.80 is: 99,968.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,742.20 : 162,854.10 = 66,751.80 : x
  2. Step 2: Convert to fraction form
    108,742.20/162,854.10 = 66,751.80/x
  3. Step 3: Cross multiply
    108,742.20x = 162,854.10 × 66,751.80
  4. Step 4: Simplify right side
    108,742.20x = 10,870,804,312.38
  5. Step 5: Solve for x
    x = 10,870,804,312.38/108,742.20
  6. Step 6: Final answer
    x = 99,968.59

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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.