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Finding the Fourth Proportional to 243,885.21, 365,834.28 and 66,395.85

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Solution

The fourth proportional to 243,885.21, 365,834.28 and 66,395.85 is: 99,595.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,885.21 : 365,834.28 = 66,395.85 : x
  2. Step 2: Convert to fraction form
    243,885.21/365,834.28 = 66,395.85/x
  3. Step 3: Cross multiply
    243,885.21x = 365,834.28 × 66,395.85
  4. Step 4: Simplify right side
    243,885.21x = 24,289,877,979.74
  5. Step 5: Solve for x
    x = 24,289,877,979.74/243,885.21
  6. Step 6: Final answer
    x = 99,595.54

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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.