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Finding the Fourth Proportional to 243,388.50, 365,117.35 and 74,922.87

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Solution

The fourth proportional to 243,388.50, 365,117.35 and 74,922.87 is: 112,394.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,388.50 : 365,117.35 = 74,922.87 : x
  2. Step 2: Convert to fraction form
    243,388.50/365,117.35 = 74,922.87/x
  3. Step 3: Cross multiply
    243,388.50x = 365,117.35 × 74,922.87
  4. Step 4: Simplify right side
    243,388.50x = 27,355,639,748.79
  5. Step 5: Solve for x
    x = 27,355,639,748.79/243,388.50
  6. Step 6: Final answer
    x = 112,394.96

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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.