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Finding the Fourth Proportional to 85,145.68, 117,456.44 and 64,967.56

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Solution

The fourth proportional to 85,145.68, 117,456.44 and 64,967.56 is: 89,621.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,145.68 : 117,456.44 = 64,967.56 : x
  2. Step 2: Convert to fraction form
    85,145.68/117,456.44 = 64,967.56/x
  3. Step 3: Cross multiply
    85,145.68x = 117,456.44 × 64,967.56
  4. Step 4: Simplify right side
    85,145.68x = 7,630,858,313.09
  5. Step 5: Solve for x
    x = 7,630,858,313.09/85,145.68
  6. Step 6: Final answer
    x = 89,621.20

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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.