Home / 42,121.20-58,150.61-28,712.16

Finding the Fourth Proportional to 42,121.20, 58,150.61 and 28,712.16

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Solution

The fourth proportional to 42,121.20, 58,150.61 and 28,712.16 is: 39,638.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,121.20 : 58,150.61 = 28,712.16 : x
  2. Step 2: Convert to fraction form
    42,121.20/58,150.61 = 28,712.16/x
  3. Step 3: Cross multiply
    42,121.20x = 58,150.61 × 28,712.16
  4. Step 4: Simplify right side
    42,121.20x = 1,669,629,582.53
  5. Step 5: Solve for x
    x = 1,669,629,582.53/42,121.20
  6. Step 6: Final answer
    x = 39,638.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.