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Finding the Fourth Proportional to 70,917.86, 106,377.14 and 20,998.90

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Solution

The fourth proportional to 70,917.86, 106,377.14 and 20,998.90 is: 31,498.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,917.86 : 106,377.14 = 20,998.90 : x
  2. Step 2: Convert to fraction form
    70,917.86/106,377.14 = 20,998.90/x
  3. Step 3: Cross multiply
    70,917.86x = 106,377.14 × 20,998.90
  4. Step 4: Simplify right side
    70,917.86x = 2,233,802,554.21
  5. Step 5: Solve for x
    x = 2,233,802,554.21/70,917.86
  6. Step 6: Final answer
    x = 31,498.45

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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.