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Finding the Fourth Proportional to 137,806.20, 206,490.60 and 91,004.40

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Solution

The fourth proportional to 137,806.20, 206,490.60 and 91,004.40 is: 136,362.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,806.20 : 206,490.60 = 91,004.40 : x
  2. Step 2: Convert to fraction form
    137,806.20/206,490.60 = 91,004.40/x
  3. Step 3: Cross multiply
    137,806.20x = 206,490.60 × 91,004.40
  4. Step 4: Simplify right side
    137,806.20x = 18,791,553,158.64
  5. Step 5: Solve for x
    x = 18,791,553,158.64/137,806.20
  6. Step 6: Final answer
    x = 136,362.17

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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.