Home / 78,310.74-117,466.24-19,146.44

Finding the Fourth Proportional to 78,310.74, 117,466.24 and 19,146.44

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Solution

The fourth proportional to 78,310.74, 117,466.24 and 19,146.44 is: 28,719.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,310.74 : 117,466.24 = 19,146.44 : x
  2. Step 2: Convert to fraction form
    78,310.74/117,466.24 = 19,146.44/x
  3. Step 3: Cross multiply
    78,310.74x = 117,466.24 × 19,146.44
  4. Step 4: Simplify right side
    78,310.74x = 2,249,060,316.19
  5. Step 5: Solve for x
    x = 2,249,060,316.19/78,310.74
  6. Step 6: Final answer
    x = 28,719.69

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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.