Home / 70,898.11-106,346.85-20,978.52

Finding the Fourth Proportional to 70,898.11, 106,346.85 and 20,978.52

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Solution

The fourth proportional to 70,898.11, 106,346.85 and 20,978.52 is: 31,467.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,898.11 : 106,346.85 = 20,978.52 : x
  2. Step 2: Convert to fraction form
    70,898.11/106,346.85 = 20,978.52/x
  3. Step 3: Cross multiply
    70,898.11x = 106,346.85 × 20,978.52
  4. Step 4: Simplify right side
    70,898.11x = 2,230,999,519.66
  5. Step 5: Solve for x
    x = 2,230,999,519.66/70,898.11
  6. Step 6: Final answer
    x = 31,467.69

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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.