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Finding the Fourth Proportional to 47,129.88, 70,693.20 and 12,069.84

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Solution

The fourth proportional to 47,129.88, 70,693.20 and 12,069.84 is: 18,104.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,129.88 : 70,693.20 = 12,069.84 : x
  2. Step 2: Convert to fraction form
    47,129.88/70,693.20 = 12,069.84/x
  3. Step 3: Cross multiply
    47,129.88x = 70,693.20 × 12,069.84
  4. Step 4: Simplify right side
    47,129.88x = 853,255,613.09
  5. Step 5: Solve for x
    x = 853,255,613.09/47,129.88
  6. Step 6: Final answer
    x = 18,104.35

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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.