Home / 90,971.28-136,409.40-28,625.04

Finding the Fourth Proportional to 90,971.28, 136,409.40 and 28,625.04

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Solution

The fourth proportional to 90,971.28, 136,409.40 and 28,625.04 is: 42,922.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,971.28 : 136,409.40 = 28,625.04 : x
  2. Step 2: Convert to fraction form
    90,971.28/136,409.40 = 28,625.04/x
  3. Step 3: Cross multiply
    90,971.28x = 136,409.40 × 28,625.04
  4. Step 4: Simplify right side
    90,971.28x = 3,904,724,531.38
  5. Step 5: Solve for x
    x = 3,904,724,531.38/90,971.28
  6. Step 6: Final answer
    x = 42,922.61

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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.