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Finding the Fourth Proportional to 259,441.13, 389,129.50 and 69,916.32

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Solution

The fourth proportional to 259,441.13, 389,129.50 and 69,916.32 is: 104,865.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,441.13 : 389,129.50 = 69,916.32 : x
  2. Step 2: Convert to fraction form
    259,441.13/389,129.50 = 69,916.32/x
  3. Step 3: Cross multiply
    259,441.13x = 389,129.50 × 69,916.32
  4. Step 4: Simplify right side
    259,441.13x = 27,206,502,643.44
  5. Step 5: Solve for x
    x = 27,206,502,643.44/259,441.13
  6. Step 6: Final answer
    x = 104,865.80

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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.