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Finding the Fourth Proportional to 73,119.80, 109,794.90 and 42,015.80

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Solution

The fourth proportional to 73,119.80, 109,794.90 and 42,015.80 is: 63,089.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,119.80 : 109,794.90 = 42,015.80 : x
  2. Step 2: Convert to fraction form
    73,119.80/109,794.90 = 42,015.80/x
  3. Step 3: Cross multiply
    73,119.80x = 109,794.90 × 42,015.80
  4. Step 4: Simplify right side
    73,119.80x = 4,613,120,559.42
  5. Step 5: Solve for x
    x = 4,613,120,559.42/73,119.80
  6. Step 6: Final answer
    x = 63,089.90

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1.5x scale

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.