Home / 78,276.78-117,267.55-60,660.50

Finding the Fourth Proportional to 78,276.78, 117,267.55 and 60,660.50

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Solution

The fourth proportional to 78,276.78, 117,267.55 and 60,660.50 is: 90,876.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,276.78 : 117,267.55 = 60,660.50 : x
  2. Step 2: Convert to fraction form
    78,276.78/117,267.55 = 60,660.50/x
  3. Step 3: Cross multiply
    78,276.78x = 117,267.55 × 60,660.50
  4. Step 4: Simplify right side
    78,276.78x = 7,113,507,478.79
  5. Step 5: Solve for x
    x = 7,113,507,478.79/78,276.78
  6. Step 6: Final answer
    x = 90,876.34

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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.