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Finding the Fourth Proportional to 112,776.56, 168,697.32 and 85,919.33

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Solution

The fourth proportional to 112,776.56, 168,697.32 and 85,919.33 is: 128,522.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,776.56 : 168,697.32 = 85,919.33 : x
  2. Step 2: Convert to fraction form
    112,776.56/168,697.32 = 85,919.33/x
  3. Step 3: Cross multiply
    112,776.56x = 168,697.32 × 85,919.33
  4. Step 4: Simplify right side
    112,776.56x = 14,494,360,707.20
  5. Step 5: Solve for x
    x = 14,494,360,707.20/112,776.56
  6. Step 6: Final answer
    x = 128,522.81

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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.