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Finding the Fourth Proportional to 92,779.70, 138,952.94 and 67,757.72

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Solution

The fourth proportional to 92,779.70, 138,952.94 and 67,757.72 is: 101,478.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,779.70 : 138,952.94 = 67,757.72 : x
  2. Step 2: Convert to fraction form
    92,779.70/138,952.94 = 67,757.72/x
  3. Step 3: Cross multiply
    92,779.70x = 138,952.94 × 67,757.72
  4. Step 4: Simplify right side
    92,779.70x = 9,415,133,368.14
  5. Step 5: Solve for x
    x = 9,415,133,368.14/92,779.70
  6. Step 6: Final answer
    x = 101,478.38

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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.