Home / 78,607.12-117,911.40-31,849

Finding the Fourth Proportional to 78,607.12, 117,911.40 and 31,849

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Solution

The fourth proportional to 78,607.12, 117,911.40 and 31,849 is: 47,773.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,607.12 : 117,911.40 = 31,849 : x
  2. Step 2: Convert to fraction form
    78,607.12/117,911.40 = 31,849/x
  3. Step 3: Cross multiply
    78,607.12x = 117,911.40 × 31,849
  4. Step 4: Simplify right side
    78,607.12x = 3,755,360,178.60
  5. Step 5: Solve for x
    x = 3,755,360,178.60/78,607.12
  6. Step 6: Final answer
    x = 47,773.79

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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.