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Finding the Fourth Proportional to 265,840.62, 398,760.93 and 78,850.50

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Solution

The fourth proportional to 265,840.62, 398,760.93 and 78,850.50 is: 118,275.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,840.62 : 398,760.93 = 78,850.50 : x
  2. Step 2: Convert to fraction form
    265,840.62/398,760.93 = 78,850.50/x
  3. Step 3: Cross multiply
    265,840.62x = 398,760.93 × 78,850.50
  4. Step 4: Simplify right side
    265,840.62x = 31,442,498,710.97
  5. Step 5: Solve for x
    x = 31,442,498,710.97/265,840.62
  6. Step 6: Final answer
    x = 118,275.75

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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.