Home / 83,778.06-115,494.75-66,631.98

Finding the Fourth Proportional to 83,778.06, 115,494.75 and 66,631.98

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Solution

The fourth proportional to 83,778.06, 115,494.75 and 66,631.98 is: 91,857.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,778.06 : 115,494.75 = 66,631.98 : x
  2. Step 2: Convert to fraction form
    83,778.06/115,494.75 = 66,631.98/x
  3. Step 3: Cross multiply
    83,778.06x = 115,494.75 × 66,631.98
  4. Step 4: Simplify right side
    83,778.06x = 7,695,643,872.11
  5. Step 5: Solve for x
    x = 7,695,643,872.11/83,778.06
  6. Step 6: Final answer
    x = 91,857.51

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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.