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Finding the Fourth Proportional to 119,916, 165,486.72 and 66,200.88

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Solution

The fourth proportional to 119,916, 165,486.72 and 66,200.88 is: 91,358.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,916 : 165,486.72 = 66,200.88 : x
  2. Step 2: Convert to fraction form
    119,916/165,486.72 = 66,200.88/x
  3. Step 3: Cross multiply
    119,916x = 165,486.72 × 66,200.88
  4. Step 4: Simplify right side
    119,916x = 10,955,366,492.31
  5. Step 5: Solve for x
    x = 10,955,366,492.31/119,916
  6. Step 6: Final answer
    x = 91,358.67

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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.