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Finding the Fourth Proportional to 259,411.78, 389,088.49 and 69,886.15

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Solution

The fourth proportional to 259,411.78, 389,088.49 and 69,886.15 is: 104,821.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,411.78 : 389,088.49 = 69,886.15 : x
  2. Step 2: Convert to fraction form
    259,411.78/389,088.49 = 69,886.15/x
  3. Step 3: Cross multiply
    259,411.78x = 389,088.49 × 69,886.15
  4. Step 4: Simplify right side
    259,411.78x = 27,191,895,690.05
  5. Step 5: Solve for x
    x = 27,191,895,690.05/259,411.78
  6. Step 6: Final answer
    x = 104,821.36

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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.