Home / 90,917.18-136,397.22-28,587.68

Finding the Fourth Proportional to 90,917.18, 136,397.22 and 28,587.68

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Solution

The fourth proportional to 90,917.18, 136,397.22 and 28,587.68 is: 42,888.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,917.18 : 136,397.22 = 28,587.68 : x
  2. Step 2: Convert to fraction form
    90,917.18/136,397.22 = 28,587.68/x
  3. Step 3: Cross multiply
    90,917.18x = 136,397.22 × 28,587.68
  4. Step 4: Simplify right side
    90,917.18x = 3,899,279,396.26
  5. Step 5: Solve for x
    x = 3,899,279,396.26/90,917.18
  6. Step 6: Final answer
    x = 42,888.26

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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.