Home / 117,191.79-161,680.05-86,638.28

Finding the Fourth Proportional to 117,191.79, 161,680.05 and 86,638.28

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Solution

The fourth proportional to 117,191.79, 161,680.05 and 86,638.28 is: 119,527.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,191.79 : 161,680.05 = 86,638.28 : x
  2. Step 2: Convert to fraction form
    117,191.79/161,680.05 = 86,638.28/x
  3. Step 3: Cross multiply
    117,191.79x = 161,680.05 × 86,638.28
  4. Step 4: Simplify right side
    117,191.79x = 14,007,680,633.91
  5. Step 5: Solve for x
    x = 14,007,680,633.91/117,191.79
  6. Step 6: Final answer
    x = 119,527.83

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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.