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Finding the Fourth Proportional to 119,186.71, 178,855.43 and 66,630.67

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Solution

The fourth proportional to 119,186.71, 178,855.43 and 66,630.67 is: 99,988.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,186.71 : 178,855.43 = 66,630.67 : x
  2. Step 2: Convert to fraction form
    119,186.71/178,855.43 = 66,630.67/x
  3. Step 3: Cross multiply
    119,186.71x = 178,855.43 × 66,630.67
  4. Step 4: Simplify right side
    119,186.71x = 11,917,256,353.75
  5. Step 5: Solve for x
    x = 11,917,256,353.75/119,186.71
  6. Step 6: Final answer
    x = 99,988.13

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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.