Home / 81,981.64-113,186.90-66,910.25

Finding the Fourth Proportional to 81,981.64, 113,186.90 and 66,910.25

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Solution

The fourth proportional to 81,981.64, 113,186.90 and 66,910.25 is: 92,378.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,981.64 : 113,186.90 = 66,910.25 : x
  2. Step 2: Convert to fraction form
    81,981.64/113,186.90 = 66,910.25/x
  3. Step 3: Cross multiply
    81,981.64x = 113,186.90 × 66,910.25
  4. Step 4: Simplify right side
    81,981.64x = 7,573,363,441.17
  5. Step 5: Solve for x
    x = 7,573,363,441.17/81,981.64
  6. Step 6: Final answer
    x = 92,378.77

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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.