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Finding the Fourth Proportional to 243,354.89, 365,045.33 and 74,990.86

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Solution

The fourth proportional to 243,354.89, 365,045.33 and 74,990.86 is: 112,490.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,354.89 : 365,045.33 = 74,990.86 : x
  2. Step 2: Convert to fraction form
    243,354.89/365,045.33 = 74,990.86/x
  3. Step 3: Cross multiply
    243,354.89x = 365,045.33 × 74,990.86
  4. Step 4: Simplify right side
    243,354.89x = 27,375,062,510.55
  5. Step 5: Solve for x
    x = 27,375,062,510.55/243,354.89
  6. Step 6: Final answer
    x = 112,490.29

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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.