Home / 89,676.12-134,421.92-39,779.72

Finding the Fourth Proportional to 89,676.12, 134,421.92 and 39,779.72

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Solution

The fourth proportional to 89,676.12, 134,421.92 and 39,779.72 is: 59,628.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,676.12 : 134,421.92 = 39,779.72 : x
  2. Step 2: Convert to fraction form
    89,676.12/134,421.92 = 39,779.72/x
  3. Step 3: Cross multiply
    89,676.12x = 134,421.92 × 39,779.72
  4. Step 4: Simplify right side
    89,676.12x = 5,347,266,121.71
  5. Step 5: Solve for x
    x = 5,347,266,121.71/89,676.12
  6. Step 6: Final answer
    x = 59,628.65

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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.