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Finding the Fourth Proportional to 90,138.47, 135,211.07 and 26,959.41

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Solution

The fourth proportional to 90,138.47, 135,211.07 and 26,959.41 is: 40,440.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,138.47 : 135,211.07 = 26,959.41 : x
  2. Step 2: Convert to fraction form
    90,138.47/135,211.07 = 26,959.41/x
  3. Step 3: Cross multiply
    90,138.47x = 135,211.07 × 26,959.41
  4. Step 4: Simplify right side
    90,138.47x = 3,645,210,740.07
  5. Step 5: Solve for x
    x = 3,645,210,740.07/90,138.47
  6. Step 6: Final answer
    x = 40,440.12

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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.