Home / 189,639.09-261,713.16-109,089.45

Finding the Fourth Proportional to 189,639.09, 261,713.16 and 109,089.45

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Solution

The fourth proportional to 189,639.09, 261,713.16 and 109,089.45 is: 150,549.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,639.09 : 261,713.16 = 109,089.45 : x
  2. Step 2: Convert to fraction form
    189,639.09/261,713.16 = 109,089.45/x
  3. Step 3: Cross multiply
    189,639.09x = 261,713.16 × 109,089.45
  4. Step 4: Simplify right side
    189,639.09x = 28,550,144,682.16
  5. Step 5: Solve for x
    x = 28,550,144,682.16/189,639.09
  6. Step 6: Final answer
    x = 150,549.89

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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.