Home / 78,716.58-118,031.06-31,914.78

Finding the Fourth Proportional to 78,716.58, 118,031.06 and 31,914.78

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Solution

The fourth proportional to 78,716.58, 118,031.06 and 31,914.78 is: 47,854.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,716.58 : 118,031.06 = 31,914.78 : x
  2. Step 2: Convert to fraction form
    78,716.58/118,031.06 = 31,914.78/x
  3. Step 3: Cross multiply
    78,716.58x = 118,031.06 × 31,914.78
  4. Step 4: Simplify right side
    78,716.58x = 3,766,935,313.07
  5. Step 5: Solve for x
    x = 3,766,935,313.07/78,716.58
  6. Step 6: Final answer
    x = 47,854.41

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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.