Home / 78,286.88-108,035.04-42,477.68

Finding the Fourth Proportional to 78,286.88, 108,035.04 and 42,477.68

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Solution

The fourth proportional to 78,286.88, 108,035.04 and 42,477.68 is: 58,618.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,286.88 : 108,035.04 = 42,477.68 : x
  2. Step 2: Convert to fraction form
    78,286.88/108,035.04 = 42,477.68/x
  3. Step 3: Cross multiply
    78,286.88x = 108,035.04 × 42,477.68
  4. Step 4: Simplify right side
    78,286.88x = 4,589,077,857.91
  5. Step 5: Solve for x
    x = 4,589,077,857.91/78,286.88
  6. Step 6: Final answer
    x = 58,618.73

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1.5x scale

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.