Home / 72,784.25-109,111.45-28,400.68

Finding the Fourth Proportional to 72,784.25, 109,111.45 and 28,400.68

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Solution

The fourth proportional to 72,784.25, 109,111.45 and 28,400.68 is: 42,575.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,784.25 : 109,111.45 = 28,400.68 : x
  2. Step 2: Convert to fraction form
    72,784.25/109,111.45 = 28,400.68/x
  3. Step 3: Cross multiply
    72,784.25x = 109,111.45 × 28,400.68
  4. Step 4: Simplify right side
    72,784.25x = 3,098,839,414.55
  5. Step 5: Solve for x
    x = 3,098,839,414.55/72,784.25
  6. Step 6: Final answer
    x = 42,575.69

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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.