Home / 103,431.12-142,689.96-65,167.44

Finding the Fourth Proportional to 103,431.12, 142,689.96 and 65,167.44

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Solution

The fourth proportional to 103,431.12, 142,689.96 and 65,167.44 is: 89,902.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,431.12 : 142,689.96 = 65,167.44 : x
  2. Step 2: Convert to fraction form
    103,431.12/142,689.96 = 65,167.44/x
  3. Step 3: Cross multiply
    103,431.12x = 142,689.96 × 65,167.44
  4. Step 4: Simplify right side
    103,431.12x = 9,298,739,406.90
  5. Step 5: Solve for x
    x = 9,298,739,406.90/103,431.12
  6. Step 6: Final answer
    x = 89,902.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.