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Finding the Fourth Proportional to 73,189.77, 100,990.39 and 42,569.64

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Solution

The fourth proportional to 73,189.77, 100,990.39 and 42,569.64 is: 58,739.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,189.77 : 100,990.39 = 42,569.64 : x
  2. Step 2: Convert to fraction form
    73,189.77/100,990.39 = 42,569.64/x
  3. Step 3: Cross multiply
    73,189.77x = 100,990.39 × 42,569.64
  4. Step 4: Simplify right side
    73,189.77x = 4,299,124,545.76
  5. Step 5: Solve for x
    x = 4,299,124,545.76/73,189.77
  6. Step 6: Final answer
    x = 58,739.42

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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.