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Finding the Fourth Proportional to 88,115.31, 121,509.81 and 75,410.73

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Solution

The fourth proportional to 88,115.31, 121,509.81 and 75,410.73 is: 103,990.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,115.31 : 121,509.81 = 75,410.73 : x
  2. Step 2: Convert to fraction form
    88,115.31/121,509.81 = 75,410.73/x
  3. Step 3: Cross multiply
    88,115.31x = 121,509.81 × 75,410.73
  4. Step 4: Simplify right side
    88,115.31x = 9,163,143,474.26
  5. Step 5: Solve for x
    x = 9,163,143,474.26/88,115.31
  6. Step 6: Final answer
    x = 103,990.37

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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.