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Finding the Fourth Proportional to 85,419.32, 117,878.87 and 47,694.92

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Solution

The fourth proportional to 85,419.32, 117,878.87 and 47,694.92 is: 65,819.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,419.32 : 117,878.87 = 47,694.92 : x
  2. Step 2: Convert to fraction form
    85,419.32/117,878.87 = 47,694.92/x
  3. Step 3: Cross multiply
    85,419.32x = 117,878.87 × 47,694.92
  4. Step 4: Simplify right side
    85,419.32x = 5,622,222,804.18
  5. Step 5: Solve for x
    x = 5,622,222,804.18/85,419.32
  6. Step 6: Final answer
    x = 65,819.10

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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.