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Finding the Fourth Proportional to 81,716.54, 112,756.56 and 45,899.70

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Solution

The fourth proportional to 81,716.54, 112,756.56 and 45,899.70 is: 63,334.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,716.54 : 112,756.56 = 45,899.70 : x
  2. Step 2: Convert to fraction form
    81,716.54/112,756.56 = 45,899.70/x
  3. Step 3: Cross multiply
    81,716.54x = 112,756.56 × 45,899.70
  4. Step 4: Simplify right side
    81,716.54x = 5,175,492,277.03
  5. Step 5: Solve for x
    x = 5,175,492,277.03/81,716.54
  6. Step 6: Final answer
    x = 63,334.70

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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.