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Finding the Fourth Proportional to 81,718.60, 112,770.99 and 45,907.85

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Solution

The fourth proportional to 81,718.60, 112,770.99 and 45,907.85 is: 63,352.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,718.60 : 112,770.99 = 45,907.85 : x
  2. Step 2: Convert to fraction form
    81,718.60/112,770.99 = 45,907.85/x
  3. Step 3: Cross multiply
    81,718.60x = 112,770.99 × 45,907.85
  4. Step 4: Simplify right side
    81,718.60x = 5,177,073,129.42
  5. Step 5: Solve for x
    x = 5,177,073,129.42/81,718.60
  6. Step 6: Final answer
    x = 63,352.45

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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.