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Finding the Fourth Proportional to 40,271.20, 60,421.20 and 16,904.80

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Solution

The fourth proportional to 40,271.20, 60,421.20 and 16,904.80 is: 25,363.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,271.20 : 60,421.20 = 16,904.80 : x
  2. Step 2: Convert to fraction form
    40,271.20/60,421.20 = 16,904.80/x
  3. Step 3: Cross multiply
    40,271.20x = 60,421.20 × 16,904.80
  4. Step 4: Simplify right side
    40,271.20x = 1,021,408,301.76
  5. Step 5: Solve for x
    x = 1,021,408,301.76/40,271.20
  6. Step 6: Final answer
    x = 25,363.24

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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.