Home / 189,443.18-261,431.59-129,119.21

Finding the Fourth Proportional to 189,443.18, 261,431.59 and 129,119.21

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Solution

The fourth proportional to 189,443.18, 261,431.59 and 129,119.21 is: 178,184.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,443.18 : 261,431.59 = 129,119.21 : x
  2. Step 2: Convert to fraction form
    189,443.18/261,431.59 = 129,119.21/x
  3. Step 3: Cross multiply
    189,443.18x = 261,431.59 × 129,119.21
  4. Step 4: Simplify right side
    189,443.18x = 33,755,840,369.84
  5. Step 5: Solve for x
    x = 33,755,840,369.84/189,443.18
  6. Step 6: Final answer
    x = 178,184.51

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1.5x scale

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.