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Finding the Fourth Proportional to 208,690.56, 312,956.04 and 113,870.06

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Solution

The fourth proportional to 208,690.56, 312,956.04 and 113,870.06 is: 170,761.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,690.56 : 312,956.04 = 113,870.06 : x
  2. Step 2: Convert to fraction form
    208,690.56/312,956.04 = 113,870.06/x
  3. Step 3: Cross multiply
    208,690.56x = 312,956.04 × 113,870.06
  4. Step 4: Simplify right side
    208,690.56x = 35,636,321,593.90
  5. Step 5: Solve for x
    x = 35,636,321,593.90/208,690.56
  6. Step 6: Final answer
    x = 170,761.54

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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.