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Finding the Fourth Proportional to 86,891.78, 119,910.60 and 47,147.78

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Solution

The fourth proportional to 86,891.78, 119,910.60 and 47,147.78 is: 65,063.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,891.78 : 119,910.60 = 47,147.78 : x
  2. Step 2: Convert to fraction form
    86,891.78/119,910.60 = 47,147.78/x
  3. Step 3: Cross multiply
    86,891.78x = 119,910.60 × 47,147.78
  4. Step 4: Simplify right side
    86,891.78x = 5,653,518,588.47
  5. Step 5: Solve for x
    x = 5,653,518,588.47/86,891.78
  6. Step 6: Final answer
    x = 65,063.91

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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.