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Finding the Fourth Proportional to 91,166.64, 136,390.32 and 69,043.92

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Solution

The fourth proportional to 91,166.64, 136,390.32 and 69,043.92 is: 103,293.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,166.64 : 136,390.32 = 69,043.92 : x
  2. Step 2: Convert to fraction form
    91,166.64/136,390.32 = 69,043.92/x
  3. Step 3: Cross multiply
    91,166.64x = 136,390.32 × 69,043.92
  4. Step 4: Simplify right side
    91,166.64x = 9,416,922,342.85
  5. Step 5: Solve for x
    x = 9,416,922,342.85/91,166.64
  6. Step 6: Final answer
    x = 103,293.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.