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Finding the Fourth Proportional to 40,291.80, 60,459.30 and 16,920.60

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Solution

The fourth proportional to 40,291.80, 60,459.30 and 16,920.60 is: 25,389.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,291.80 : 60,459.30 = 16,920.60 : x
  2. Step 2: Convert to fraction form
    40,291.80/60,459.30 = 16,920.60/x
  3. Step 3: Cross multiply
    40,291.80x = 60,459.30 × 16,920.60
  4. Step 4: Simplify right side
    40,291.80x = 1,023,007,631.58
  5. Step 5: Solve for x
    x = 1,023,007,631.58/40,291.80
  6. Step 6: Final answer
    x = 25,389.97

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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.