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Finding the Fourth Proportional to 66,722.34, 92,138.05 and 42,890.52

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Solution

The fourth proportional to 66,722.34, 92,138.05 and 42,890.52 is: 59,228.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,722.34 : 92,138.05 = 42,890.52 : x
  2. Step 2: Convert to fraction form
    66,722.34/92,138.05 = 42,890.52/x
  3. Step 3: Cross multiply
    66,722.34x = 92,138.05 × 42,890.52
  4. Step 4: Simplify right side
    66,722.34x = 3,951,848,876.29
  5. Step 5: Solve for x
    x = 3,951,848,876.29/66,722.34
  6. Step 6: Final answer
    x = 59,228.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.