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Finding the Fourth Proportional to 104,751.92, 157,003.08 and 72,990.08

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Solution

The fourth proportional to 104,751.92, 157,003.08 and 72,990.08 is: 109,398.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,751.92 : 157,003.08 = 72,990.08 : x
  2. Step 2: Convert to fraction form
    104,751.92/157,003.08 = 72,990.08/x
  3. Step 3: Cross multiply
    104,751.92x = 157,003.08 × 72,990.08
  4. Step 4: Simplify right side
    104,751.92x = 11,459,667,369.45
  5. Step 5: Solve for x
    x = 11,459,667,369.45/104,751.92
  6. Step 6: Final answer
    x = 109,398.16

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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.