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Finding the Fourth Proportional to 265,503.15, 398,107.13 and 87,913.28

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Solution

The fourth proportional to 265,503.15, 398,107.13 and 87,913.28 is: 131,821.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,503.15 : 398,107.13 = 87,913.28 : x
  2. Step 2: Convert to fraction form
    265,503.15/398,107.13 = 87,913.28/x
  3. Step 3: Cross multiply
    265,503.15x = 398,107.13 × 87,913.28
  4. Step 4: Simplify right side
    265,503.15x = 34,998,904,145.39
  5. Step 5: Solve for x
    x = 34,998,904,145.39/265,503.15
  6. Step 6: Final answer
    x = 131,821.05

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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.