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Finding the Fourth Proportional to 39,978.72, 59,968.28 and 16,605.18

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Solution

The fourth proportional to 39,978.72, 59,968.28 and 16,605.18 is: 24,907.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,978.72 : 59,968.28 = 16,605.18 : x
  2. Step 2: Convert to fraction form
    39,978.72/59,968.28 = 16,605.18/x
  3. Step 3: Cross multiply
    39,978.72x = 59,968.28 × 16,605.18
  4. Step 4: Simplify right side
    39,978.72x = 995,784,125.20
  5. Step 5: Solve for x
    x = 995,784,125.20/39,978.72
  6. Step 6: Final answer
    x = 24,907.85

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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.