Home / 189,724.16-261,822.78-103,686.78

Finding the Fourth Proportional to 189,724.16, 261,822.78 and 103,686.78

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Solution

The fourth proportional to 189,724.16, 261,822.78 and 103,686.78 is: 143,089.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,724.16 : 261,822.78 = 103,686.78 : x
  2. Step 2: Convert to fraction form
    189,724.16/261,822.78 = 103,686.78/x
  3. Step 3: Cross multiply
    189,724.16x = 261,822.78 × 103,686.78
  4. Step 4: Simplify right side
    189,724.16x = 27,147,560,988.85
  5. Step 5: Solve for x
    x = 27,147,560,988.85/189,724.16
  6. Step 6: Final answer
    x = 143,089.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.