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Finding the Fourth Proportional to 92,621.88, 138,119.31 and 91,779.84

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Solution

The fourth proportional to 92,621.88, 138,119.31 and 91,779.84 is: 136,863.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,621.88 : 138,119.31 = 91,779.84 : x
  2. Step 2: Convert to fraction form
    92,621.88/138,119.31 = 91,779.84/x
  3. Step 3: Cross multiply
    92,621.88x = 138,119.31 × 91,779.84
  4. Step 4: Simplify right side
    92,621.88x = 12,676,568,172.71
  5. Step 5: Solve for x
    x = 12,676,568,172.71/92,621.88
  6. Step 6: Final answer
    x = 136,863.65

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.