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Finding the Fourth Proportional to 71,294.12, 106,935.60 and 18,702.23

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Solution

The fourth proportional to 71,294.12, 106,935.60 and 18,702.23 is: 28,051.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,294.12 : 106,935.60 = 18,702.23 : x
  2. Step 2: Convert to fraction form
    71,294.12/106,935.60 = 18,702.23/x
  3. Step 3: Cross multiply
    71,294.12x = 106,935.60 × 18,702.23
  4. Step 4: Simplify right side
    71,294.12x = 1,999,934,186.39
  5. Step 5: Solve for x
    x = 1,999,934,186.39/71,294.12
  6. Step 6: Final answer
    x = 28,051.88

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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.