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Finding the Fourth Proportional to 259,776.53, 389,686.90 and 91,282.31

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Solution

The fourth proportional to 259,776.53, 389,686.90 and 91,282.31 is: 136,931.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,776.53 : 389,686.90 = 91,282.31 : x
  2. Step 2: Convert to fraction form
    259,776.53/389,686.90 = 91,282.31/x
  3. Step 3: Cross multiply
    259,776.53x = 389,686.90 × 91,282.31
  4. Step 4: Simplify right side
    259,776.53x = 35,571,519,864.58
  5. Step 5: Solve for x
    x = 35,571,519,864.58/259,776.53
  6. Step 6: Final answer
    x = 136,931.23

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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.