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Finding the Fourth Proportional to 302,919.62, 454,379.40 and 81,303.62

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Solution

The fourth proportional to 302,919.62, 454,379.40 and 81,303.62 is: 121,955.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    302,919.62 : 454,379.40 = 81,303.62 : x
  2. Step 2: Convert to fraction form
    302,919.62/454,379.40 = 81,303.62/x
  3. Step 3: Cross multiply
    302,919.62x = 454,379.40 × 81,303.62
  4. Step 4: Simplify right side
    302,919.62x = 36,942,690,073.43
  5. Step 5: Solve for x
    x = 36,942,690,073.43/302,919.62
  6. Step 6: Final answer
    x = 121,955.42

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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.