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Finding the Fourth Proportional to 99,469.70, 149,206.14 and 55,376.72

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Solution

The fourth proportional to 99,469.70, 149,206.14 and 55,376.72 is: 83,065.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,469.70 : 149,206.14 = 55,376.72 : x
  2. Step 2: Convert to fraction form
    99,469.70/149,206.14 = 55,376.72/x
  3. Step 3: Cross multiply
    99,469.70x = 149,206.14 × 55,376.72
  4. Step 4: Simplify right side
    99,469.70x = 8,262,547,010.08
  5. Step 5: Solve for x
    x = 8,262,547,010.08/99,469.70
  6. Step 6: Final answer
    x = 83,065.97

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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.