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Finding the Fourth Proportional to 288,745.20, 432,988.20 and 111,193.20

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Solution

The fourth proportional to 288,745.20, 432,988.20 and 111,193.20 is: 166,739.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,745.20 : 432,988.20 = 111,193.20 : x
  2. Step 2: Convert to fraction form
    288,745.20/432,988.20 = 111,193.20/x
  3. Step 3: Cross multiply
    288,745.20x = 432,988.20 × 111,193.20
  4. Step 4: Simplify right side
    288,745.20x = 48,145,343,520.24
  5. Step 5: Solve for x
    x = 48,145,343,520.24/288,745.20
  6. Step 6: Final answer
    x = 166,739.89

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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.