Home / 78,165.42-117,253.58-31,418.25

Finding the Fourth Proportional to 78,165.42, 117,253.58 and 31,418.25

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Solution

The fourth proportional to 78,165.42, 117,253.58 and 31,418.25 is: 47,129.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,165.42 : 117,253.58 = 31,418.25 : x
  2. Step 2: Convert to fraction form
    78,165.42/117,253.58 = 31,418.25/x
  3. Step 3: Cross multiply
    78,165.42x = 117,253.58 × 31,418.25
  4. Step 4: Simplify right side
    78,165.42x = 3,683,902,132.74
  5. Step 5: Solve for x
    x = 3,683,902,132.74/78,165.42
  6. Step 6: Final answer
    x = 47,129.56

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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.