Home / 90,869.18-136,325.33-28,539.68

Finding the Fourth Proportional to 90,869.18, 136,325.33 and 28,539.68

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Solution

The fourth proportional to 90,869.18, 136,325.33 and 28,539.68 is: 42,816.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,869.18 : 136,325.33 = 28,539.68 : x
  2. Step 2: Convert to fraction form
    90,869.18/136,325.33 = 28,539.68/x
  3. Step 3: Cross multiply
    90,869.18x = 136,325.33 × 28,539.68
  4. Step 4: Simplify right side
    90,869.18x = 3,890,680,469.77
  5. Step 5: Solve for x
    x = 3,890,680,469.77/90,869.18
  6. Step 6: Final answer
    x = 42,816.28

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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.