Home / 78,719.93-117,578.20-71,211.94

Finding the Fourth Proportional to 78,719.93, 117,578.20 and 71,211.94

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Solution

The fourth proportional to 78,719.93, 117,578.20 and 71,211.94 is: 106,364.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,719.93 : 117,578.20 = 71,211.94 : x
  2. Step 2: Convert to fraction form
    78,719.93/117,578.20 = 71,211.94/x
  3. Step 3: Cross multiply
    78,719.93x = 117,578.20 × 71,211.94
  4. Step 4: Simplify right side
    78,719.93x = 8,372,971,723.71
  5. Step 5: Solve for x
    x = 8,372,971,723.71/78,719.93
  6. Step 6: Final answer
    x = 106,364.06

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.