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Finding the Fourth Proportional to 265,503.66, 398,107.88 and 87,913.78

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Solution

The fourth proportional to 265,503.66, 398,107.88 and 87,913.78 is: 131,821.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,503.66 : 398,107.88 = 87,913.78 : x
  2. Step 2: Convert to fraction form
    265,503.66/398,107.88 = 87,913.78/x
  3. Step 3: Cross multiply
    265,503.66x = 398,107.88 × 87,913.78
  4. Step 4: Simplify right side
    265,503.66x = 34,999,168,578.59
  5. Step 5: Solve for x
    x = 34,999,168,578.59/265,503.66
  6. Step 6: Final answer
    x = 131,821.79

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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.