Home / 108,772.11-163,138.70-69,211.71

Finding the Fourth Proportional to 108,772.11, 163,138.70 and 69,211.71

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Solution

The fourth proportional to 108,772.11, 163,138.70 and 69,211.71 is: 103,805.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,772.11 : 163,138.70 = 69,211.71 : x
  2. Step 2: Convert to fraction form
    108,772.11/163,138.70 = 69,211.71/x
  3. Step 3: Cross multiply
    108,772.11x = 163,138.70 × 69,211.71
  4. Step 4: Simplify right side
    108,772.11x = 11,291,108,394.18
  5. Step 5: Solve for x
    x = 11,291,108,394.18/108,772.11
  6. Step 6: Final answer
    x = 103,805.18

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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.