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Finding the Fourth Proportional to 86,689.12, 119,629.56 and 48,449.56

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Solution

The fourth proportional to 86,689.12, 119,629.56 and 48,449.56 is: 66,859.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,689.12 : 119,629.56 = 48,449.56 : x
  2. Step 2: Convert to fraction form
    86,689.12/119,629.56 = 48,449.56/x
  3. Step 3: Cross multiply
    86,689.12x = 119,629.56 × 48,449.56
  4. Step 4: Simplify right side
    86,689.12x = 5,795,999,544.99
  5. Step 5: Solve for x
    x = 5,795,999,544.99/86,689.12
  6. Step 6: Final answer
    x = 66,859.60

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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.