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Finding the Fourth Proportional to 265,889.50, 398,834.04 and 78,901.00

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Solution

The fourth proportional to 265,889.50, 398,834.04 and 78,901.00 is: 118,351.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,889.50 : 398,834.04 = 78,901.00 : x
  2. Step 2: Convert to fraction form
    265,889.50/398,834.04 = 78,901.00/x
  3. Step 3: Cross multiply
    265,889.50x = 398,834.04 × 78,901.00
  4. Step 4: Simplify right side
    265,889.50x = 31,468,403,592.95
  5. Step 5: Solve for x
    x = 31,468,403,592.95/265,889.50
  6. Step 6: Final answer
    x = 118,351.44

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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.