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Finding the Fourth Proportional to 136,690.80, 205,036.20 and 73,705.20

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Solution

The fourth proportional to 136,690.80, 205,036.20 and 73,705.20 is: 110,557.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,690.80 : 205,036.20 = 73,705.20 : x
  2. Step 2: Convert to fraction form
    136,690.80/205,036.20 = 73,705.20/x
  3. Step 3: Cross multiply
    136,690.80x = 205,036.20 × 73,705.20
  4. Step 4: Simplify right side
    136,690.80x = 15,112,234,128.24
  5. Step 5: Solve for x
    x = 15,112,234,128.24/136,690.80
  6. Step 6: Final answer
    x = 110,557.80

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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.