Home / 70,918.61-106,378.26-20,999.65

Finding the Fourth Proportional to 70,918.61, 106,378.26 and 20,999.65

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Solution

The fourth proportional to 70,918.61, 106,378.26 and 20,999.65 is: 31,499.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,918.61 : 106,378.26 = 20,999.65 : x
  2. Step 2: Convert to fraction form
    70,918.61/106,378.26 = 20,999.65/x
  3. Step 3: Cross multiply
    70,918.61x = 106,378.26 × 20,999.65
  4. Step 4: Simplify right side
    70,918.61x = 2,233,905,961.66
  5. Step 5: Solve for x
    x = 2,233,905,961.66/70,918.61
  6. Step 6: Final answer
    x = 31,499.57

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Similar ratio
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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.