Home / 78,278.78-117,270.54-60,662.50

Finding the Fourth Proportional to 78,278.78, 117,270.54 and 60,662.50

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Solution

The fourth proportional to 78,278.78, 117,270.54 and 60,662.50 is: 90,879.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,278.78 : 117,270.54 = 60,662.50 : x
  2. Step 2: Convert to fraction form
    78,278.78/117,270.54 = 60,662.50/x
  3. Step 3: Cross multiply
    78,278.78x = 117,270.54 × 60,662.50
  4. Step 4: Simplify right side
    78,278.78x = 7,113,924,132.75
  5. Step 5: Solve for x
    x = 7,113,924,132.75/78,278.78
  6. Step 6: Final answer
    x = 90,879.34

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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.