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Finding the Fourth Proportional to 238,421.20, 357,631.80 and 72,209.20

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Solution

The fourth proportional to 238,421.20, 357,631.80 and 72,209.20 is: 108,313.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,421.20 : 357,631.80 = 72,209.20 : x
  2. Step 2: Convert to fraction form
    238,421.20/357,631.80 = 72,209.20/x
  3. Step 3: Cross multiply
    238,421.20x = 357,631.80 × 72,209.20
  4. Step 4: Simplify right side
    238,421.20x = 25,824,306,172.56
  5. Step 5: Solve for x
    x = 25,824,306,172.56/238,421.20
  6. Step 6: Final answer
    x = 108,313.80

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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.