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Finding the Fourth Proportional to 136,908.60, 205,362.90 and 135,065.40

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Solution

The fourth proportional to 136,908.60, 205,362.90 and 135,065.40 is: 202,598.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,908.60 : 205,362.90 = 135,065.40 : x
  2. Step 2: Convert to fraction form
    136,908.60/205,362.90 = 135,065.40/x
  3. Step 3: Cross multiply
    136,908.60x = 205,362.90 × 135,065.40
  4. Step 4: Simplify right side
    136,908.60x = 27,737,422,233.66
  5. Step 5: Solve for x
    x = 27,737,422,233.66/136,908.60
  6. Step 6: Final answer
    x = 202,598.10

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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.