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Finding the Fourth Proportional to 81,616.80, 112,655.70 and 47,634.60

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Solution

The fourth proportional to 81,616.80, 112,655.70 and 47,634.60 is: 65,750.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,616.80 : 112,655.70 = 47,634.60 : x
  2. Step 2: Convert to fraction form
    81,616.80/112,655.70 = 47,634.60/x
  3. Step 3: Cross multiply
    81,616.80x = 112,655.70 × 47,634.60
  4. Step 4: Simplify right side
    81,616.80x = 5,366,309,207.22
  5. Step 5: Solve for x
    x = 5,366,309,207.22/81,616.80
  6. Step 6: Final answer
    x = 65,750.06

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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.