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Finding the Fourth Proportional to 86,891.76, 119,910.60 and 47,147.76

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Solution

The fourth proportional to 86,891.76, 119,910.60 and 47,147.76 is: 65,063.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,891.76 : 119,910.60 = 47,147.76 : x
  2. Step 2: Convert to fraction form
    86,891.76/119,910.60 = 47,147.76/x
  3. Step 3: Cross multiply
    86,891.76x = 119,910.60 × 47,147.76
  4. Step 4: Simplify right side
    86,891.76x = 5,653,516,190.26
  5. Step 5: Solve for x
    x = 5,653,516,190.26/86,891.76
  6. Step 6: Final answer
    x = 65,063.89

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1.5x scale

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.