Home / 99,647.87-148,836.78-90,145.62

Finding the Fourth Proportional to 99,647.87, 148,836.78 and 90,145.62

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Solution

The fourth proportional to 99,647.87, 148,836.78 and 90,145.62 is: 134,643.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,647.87 : 148,836.78 = 90,145.62 : x
  2. Step 2: Convert to fraction form
    99,647.87/148,836.78 = 90,145.62/x
  3. Step 3: Cross multiply
    99,647.87x = 148,836.78 × 90,145.62
  4. Step 4: Simplify right side
    99,647.87x = 13,416,983,811.90
  5. Step 5: Solve for x
    x = 13,416,983,811.90/99,647.87
  6. Step 6: Final answer
    x = 134,643.97

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.