Home / 130,638.12-195,624.79-86,129.83

Finding the Fourth Proportional to 130,638.12, 195,624.79 and 86,129.83

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Solution

The fourth proportional to 130,638.12, 195,624.79 and 86,129.83 is: 128,975.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,638.12 : 195,624.79 = 86,129.83 : x
  2. Step 2: Convert to fraction form
    130,638.12/195,624.79 = 86,129.83/x
  3. Step 3: Cross multiply
    130,638.12x = 195,624.79 × 86,129.83
  4. Step 4: Simplify right side
    130,638.12x = 16,849,129,906.49
  5. Step 5: Solve for x
    x = 16,849,129,906.49/130,638.12
  6. Step 6: Final answer
    x = 128,975.60

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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.