Home / 90,869.19-136,325.34-28,539.69

Finding the Fourth Proportional to 90,869.19, 136,325.34 and 28,539.69

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Solution

The fourth proportional to 90,869.19, 136,325.34 and 28,539.69 is: 42,816.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,869.19 : 136,325.34 = 28,539.69 : x
  2. Step 2: Convert to fraction form
    90,869.19/136,325.34 = 28,539.69/x
  3. Step 3: Cross multiply
    90,869.19x = 136,325.34 × 28,539.69
  4. Step 4: Simplify right side
    90,869.19x = 3,890,682,942.74
  5. Step 5: Solve for x
    x = 3,890,682,942.74/90,869.19
  6. Step 6: Final answer
    x = 42,816.30

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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.