Home / 78,086.04-117,175.71-71,733.66

Finding the Fourth Proportional to 78,086.04, 117,175.71 and 71,733.66

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Solution

The fourth proportional to 78,086.04, 117,175.71 and 71,733.66 is: 107,643.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,086.04 : 117,175.71 = 71,733.66 : x
  2. Step 2: Convert to fraction form
    78,086.04/117,175.71 = 71,733.66/x
  3. Step 3: Cross multiply
    78,086.04x = 117,175.71 × 71,733.66
  4. Step 4: Simplify right side
    78,086.04x = 8,405,442,541.40
  5. Step 5: Solve for x
    x = 8,405,442,541.40/78,086.04
  6. Step 6: Final answer
    x = 107,643.34

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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.