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Finding the Fourth Proportional to 108,672.30, 163,054.62 and 69,306.30

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Solution

The fourth proportional to 108,672.30, 163,054.62 and 69,306.30 is: 103,988.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,672.30 : 163,054.62 = 69,306.30 : x
  2. Step 2: Convert to fraction form
    108,672.30/163,054.62 = 69,306.30/x
  3. Step 3: Cross multiply
    108,672.30x = 163,054.62 × 69,306.30
  4. Step 4: Simplify right side
    108,672.30x = 11,300,712,410.11
  5. Step 5: Solve for x
    x = 11,300,712,410.11/108,672.30
  6. Step 6: Final answer
    x = 103,988.90

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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.