Home / 189,723.15-261,821.40-103,685.78

Finding the Fourth Proportional to 189,723.15, 261,821.40 and 103,685.78

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Solution

The fourth proportional to 189,723.15, 261,821.40 and 103,685.78 is: 143,088.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,723.15 : 261,821.40 = 103,685.78 : x
  2. Step 2: Convert to fraction form
    189,723.15/261,821.40 = 103,685.78/x
  3. Step 3: Cross multiply
    189,723.15x = 261,821.40 × 103,685.78
  4. Step 4: Simplify right side
    189,723.15x = 27,147,156,079.69
  5. Step 5: Solve for x
    x = 27,147,156,079.69/189,723.15
  6. Step 6: Final answer
    x = 143,088.26

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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.