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Finding the Fourth Proportional to 81,878.60, 112,975.40 and 47,880.46

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Solution

The fourth proportional to 81,878.60, 112,975.40 and 47,880.46 is: 66,065.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,878.60 : 112,975.40 = 47,880.46 : x
  2. Step 2: Convert to fraction form
    81,878.60/112,975.40 = 47,880.46/x
  3. Step 3: Cross multiply
    81,878.60x = 112,975.40 × 47,880.46
  4. Step 4: Simplify right side
    81,878.60x = 5,409,314,120.68
  5. Step 5: Solve for x
    x = 5,409,314,120.68/81,878.60
  6. Step 6: Final answer
    x = 66,065.05

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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.