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Finding the Fourth Proportional to 266,639.33, 399,919.66 and 98,120.51

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Solution

The fourth proportional to 266,639.33, 399,919.66 and 98,120.51 is: 147,166.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,639.33 : 399,919.66 = 98,120.51 : x
  2. Step 2: Convert to fraction form
    266,639.33/399,919.66 = 98,120.51/x
  3. Step 3: Cross multiply
    266,639.33x = 399,919.66 × 98,120.51
  4. Step 4: Simplify right side
    266,639.33x = 39,240,320,998.23
  5. Step 5: Solve for x
    x = 39,240,320,998.23/266,639.33
  6. Step 6: Final answer
    x = 147,166.29

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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.