Home / 90,779.22-136,172.49-31,620.87

Finding the Fourth Proportional to 90,779.22, 136,172.49 and 31,620.87

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Solution

The fourth proportional to 90,779.22, 136,172.49 and 31,620.87 is: 47,432.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,779.22 : 136,172.49 = 31,620.87 : x
  2. Step 2: Convert to fraction form
    90,779.22/136,172.49 = 31,620.87/x
  3. Step 3: Cross multiply
    90,779.22x = 136,172.49 × 31,620.87
  4. Step 4: Simplify right side
    90,779.22x = 4,305,892,603.87
  5. Step 5: Solve for x
    x = 4,305,892,603.87/90,779.22
  6. Step 6: Final answer
    x = 47,432.58

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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.