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Finding the Fourth Proportional to 333,838.50, 500,758.38 and 81,119.20

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Solution

The fourth proportional to 333,838.50, 500,758.38 and 81,119.20 is: 121,678.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    333,838.50 : 500,758.38 = 81,119.20 : x
  2. Step 2: Convert to fraction form
    333,838.50/500,758.38 = 81,119.20/x
  3. Step 3: Cross multiply
    333,838.50x = 500,758.38 × 81,119.20
  4. Step 4: Simplify right side
    333,838.50x = 40,621,119,178.90
  5. Step 5: Solve for x
    x = 40,621,119,178.90/333,838.50
  6. Step 6: Final answer
    x = 121,678.95

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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.