Home / 70,890.26-106,356.15-20,971.68

Finding the Fourth Proportional to 70,890.26, 106,356.15 and 20,971.68

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Solution

The fourth proportional to 70,890.26, 106,356.15 and 20,971.68 is: 31,463.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,890.26 : 106,356.15 = 20,971.68 : x
  2. Step 2: Convert to fraction form
    70,890.26/106,356.15 = 20,971.68/x
  3. Step 3: Cross multiply
    70,890.26x = 106,356.15 × 20,971.68
  4. Step 4: Simplify right side
    70,890.26x = 2,230,467,143.83
  5. Step 5: Solve for x
    x = 2,230,467,143.83/70,890.26
  6. Step 6: Final answer
    x = 31,463.66

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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.