Home / 76,310.08-105,290.22-66,220.72

Finding the Fourth Proportional to 76,310.08, 105,290.22 and 66,220.72

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Solution

The fourth proportional to 76,310.08, 105,290.22 and 66,220.72 is: 91,369.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,310.08 : 105,290.22 = 66,220.72 : x
  2. Step 2: Convert to fraction form
    76,310.08/105,290.22 = 66,220.72/x
  3. Step 3: Cross multiply
    76,310.08x = 105,290.22 × 66,220.72
  4. Step 4: Simplify right side
    76,310.08x = 6,972,394,177.36
  5. Step 5: Solve for x
    x = 6,972,394,177.36/76,310.08
  6. Step 6: Final answer
    x = 91,369.24

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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.