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Finding the Fourth Proportional to 259,412.59, 389,089.71 and 69,886.96

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Solution

The fourth proportional to 259,412.59, 389,089.71 and 69,886.96 is: 104,822.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,412.59 : 389,089.71 = 69,886.96 : x
  2. Step 2: Convert to fraction form
    259,412.59/389,089.71 = 69,886.96/x
  3. Step 3: Cross multiply
    259,412.59x = 389,089.71 × 69,886.96
  4. Step 4: Simplify right side
    259,412.59x = 27,192,296,999.18
  5. Step 5: Solve for x
    x = 27,192,296,999.18/259,412.59
  6. Step 6: Final answer
    x = 104,822.58

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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.