Home / 78,128.78-117,207.74-25,541.14

Finding the Fourth Proportional to 78,128.78, 117,207.74 and 25,541.14

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Solution

The fourth proportional to 78,128.78, 117,207.74 and 25,541.14 is: 38,316.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,128.78 : 117,207.74 = 25,541.14 : x
  2. Step 2: Convert to fraction form
    78,128.78/117,207.74 = 25,541.14/x
  3. Step 3: Cross multiply
    78,128.78x = 117,207.74 × 25,541.14
  4. Step 4: Simplify right side
    78,128.78x = 2,993,619,296.42
  5. Step 5: Solve for x
    x = 2,993,619,296.42/78,128.78
  6. Step 6: Final answer
    x = 38,316.47

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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.