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Finding the Fourth Proportional to 238,912.80, 358,369.20 and 72,748.32

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Solution

The fourth proportional to 238,912.80, 358,369.20 and 72,748.32 is: 109,122.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,912.80 : 358,369.20 = 72,748.32 : x
  2. Step 2: Convert to fraction form
    238,912.80/358,369.20 = 72,748.32/x
  3. Step 3: Cross multiply
    238,912.80x = 358,369.20 × 72,748.32
  4. Step 4: Simplify right side
    238,912.80x = 26,070,757,239.74
  5. Step 5: Solve for x
    x = 26,070,757,239.74/238,912.80
  6. Step 6: Final answer
    x = 109,122.48

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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.