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Finding the Fourth Proportional to 108,699.92, 162,809 and 83,554.80

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Solution

The fourth proportional to 108,699.92, 162,809 and 83,554.80 is: 125,147.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,699.92 : 162,809 = 83,554.80 : x
  2. Step 2: Convert to fraction form
    108,699.92/162,809 = 83,554.80/x
  3. Step 3: Cross multiply
    108,699.92x = 162,809 × 83,554.80
  4. Step 4: Simplify right side
    108,699.92x = 13,603,473,433.20
  5. Step 5: Solve for x
    x = 13,603,473,433.20/108,699.92
  6. Step 6: Final answer
    x = 125,147.04

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1.5x scale

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.