Home / 78,070.19-117,121.49-31,326.71

Finding the Fourth Proportional to 78,070.19, 117,121.49 and 31,326.71

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Solution

The fourth proportional to 78,070.19, 117,121.49 and 31,326.71 is: 46,996.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,070.19 : 117,121.49 = 31,326.71 : x
  2. Step 2: Convert to fraction form
    78,070.19/117,121.49 = 31,326.71/x
  3. Step 3: Cross multiply
    78,070.19x = 117,121.49 × 31,326.71
  4. Step 4: Simplify right side
    78,070.19x = 3,669,030,209.76
  5. Step 5: Solve for x
    x = 3,669,030,209.76/78,070.19
  6. Step 6: Final answer
    x = 46,996.56

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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.