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Finding the Fourth Proportional to 81,352.56, 112,267.02 and 47,380.80

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Solution

The fourth proportional to 81,352.56, 112,267.02 and 47,380.80 is: 65,385.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,352.56 : 112,267.02 = 47,380.80 : x
  2. Step 2: Convert to fraction form
    81,352.56/112,267.02 = 47,380.80/x
  3. Step 3: Cross multiply
    81,352.56x = 112,267.02 × 47,380.80
  4. Step 4: Simplify right side
    81,352.56x = 5,319,301,221.22
  5. Step 5: Solve for x
    x = 5,319,301,221.22/81,352.56
  6. Step 6: Final answer
    x = 65,385.79

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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.