Home / 78,087.94-117,153.78-31,373.62

Finding the Fourth Proportional to 78,087.94, 117,153.78 and 31,373.62

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Solution

The fourth proportional to 78,087.94, 117,153.78 and 31,373.62 is: 47,069.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,087.94 : 117,153.78 = 31,373.62 : x
  2. Step 2: Convert to fraction form
    78,087.94/117,153.78 = 31,373.62/x
  3. Step 3: Cross multiply
    78,087.94x = 117,153.78 × 31,373.62
  4. Step 4: Simplify right side
    78,087.94x = 3,675,538,175.28
  5. Step 5: Solve for x
    x = 3,675,538,175.28/78,087.94
  6. Step 6: Final answer
    x = 47,069.22

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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.