Home / 78,108.94-117,185.28-31,394.62

Finding the Fourth Proportional to 78,108.94, 117,185.28 and 31,394.62

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Solution

The fourth proportional to 78,108.94, 117,185.28 and 31,394.62 is: 47,100.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,108.94 : 117,185.28 = 31,394.62 : x
  2. Step 2: Convert to fraction form
    78,108.94/117,185.28 = 31,394.62/x
  3. Step 3: Cross multiply
    78,108.94x = 117,185.28 × 31,394.62
  4. Step 4: Simplify right side
    78,108.94x = 3,678,987,335.19
  5. Step 5: Solve for x
    x = 3,678,987,335.19/78,108.94
  6. Step 6: Final answer
    x = 47,100.72

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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.