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Finding the Fourth Proportional to 265,836.79, 398,776.79 and 78,847.75

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Solution

The fourth proportional to 265,836.79, 398,776.79 and 78,847.75 is: 118,278.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,836.79 : 398,776.79 = 78,847.75 : x
  2. Step 2: Convert to fraction form
    265,836.79/398,776.79 = 78,847.75/x
  3. Step 3: Cross multiply
    265,836.79x = 398,776.79 × 78,847.75
  4. Step 4: Simplify right side
    265,836.79x = 31,442,652,643.72
  5. Step 5: Solve for x
    x = 31,442,652,643.72/265,836.79
  6. Step 6: Final answer
    x = 118,278.03

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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.