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Finding the Fourth Proportional to 243,910.20, 365,871.72 and 66,420.84

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Solution

The fourth proportional to 243,910.20, 365,871.72 and 66,420.84 is: 99,633.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,910.20 : 365,871.72 = 66,420.84 : x
  2. Step 2: Convert to fraction form
    243,910.20/365,871.72 = 66,420.84/x
  3. Step 3: Cross multiply
    243,910.20x = 365,871.72 × 66,420.84
  4. Step 4: Simplify right side
    243,910.20x = 24,301,506,974.64
  5. Step 5: Solve for x
    x = 24,301,506,974.64/243,910.20
  6. Step 6: Final answer
    x = 99,633.01

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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.