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Finding the Fourth Proportional to 259,366.71, 389,141.58 and 90,933.96

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Solution

The fourth proportional to 259,366.71, 389,141.58 and 90,933.96 is: 136,433.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,366.71 : 389,141.58 = 90,933.96 : x
  2. Step 2: Convert to fraction form
    259,366.71/389,141.58 = 90,933.96/x
  3. Step 3: Cross multiply
    259,366.71x = 389,141.58 × 90,933.96
  4. Step 4: Simplify right side
    259,366.71x = 35,386,184,870.06
  5. Step 5: Solve for x
    x = 35,386,184,870.06/259,366.71
  6. Step 6: Final answer
    x = 136,433.03

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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.