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Finding the Fourth Proportional to 117,878.72, 176,819.90 and 65,620.35

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Solution

The fourth proportional to 117,878.72, 176,819.90 and 65,620.35 is: 98,431.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,878.72 : 176,819.90 = 65,620.35 : x
  2. Step 2: Convert to fraction form
    117,878.72/176,819.90 = 65,620.35/x
  3. Step 3: Cross multiply
    117,878.72x = 176,819.90 × 65,620.35
  4. Step 4: Simplify right side
    117,878.72x = 11,602,983,396.86
  5. Step 5: Solve for x
    x = 11,602,983,396.86/117,878.72
  6. Step 6: Final answer
    x = 98,431.54

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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.