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Finding the Fourth Proportional to 92,372.49, 138,212.72 and 65,779.92

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Solution

The fourth proportional to 92,372.49, 138,212.72 and 65,779.92 is: 98,423.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,372.49 : 138,212.72 = 65,779.92 : x
  2. Step 2: Convert to fraction form
    92,372.49/138,212.72 = 65,779.92/x
  3. Step 3: Cross multiply
    92,372.49x = 138,212.72 × 65,779.92
  4. Step 4: Simplify right side
    92,372.49x = 9,091,621,335.68
  5. Step 5: Solve for x
    x = 9,091,621,335.68/92,372.49
  6. Step 6: Final answer
    x = 98,423.47

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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.