Home / 131,105.65-196,166.40-86,818.90

Finding the Fourth Proportional to 131,105.65, 196,166.40 and 86,818.90

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Solution

The fourth proportional to 131,105.65, 196,166.40 and 86,818.90 is: 129,902.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,105.65 : 196,166.40 = 86,818.90 : x
  2. Step 2: Convert to fraction form
    131,105.65/196,166.40 = 86,818.90/x
  3. Step 3: Cross multiply
    131,105.65x = 196,166.40 × 86,818.90
  4. Step 4: Simplify right side
    131,105.65x = 17,030,951,064.96
  5. Step 5: Solve for x
    x = 17,030,951,064.96/131,105.65
  6. Step 6: Final answer
    x = 129,902.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.