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Finding the Fourth Proportional to 81,859.01, 112,979.23 and 47,398.73

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Solution

The fourth proportional to 81,859.01, 112,979.23 and 47,398.73 is: 65,418.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,859.01 : 112,979.23 = 47,398.73 : x
  2. Step 2: Convert to fraction form
    81,859.01/112,979.23 = 47,398.73/x
  3. Step 3: Cross multiply
    81,859.01x = 112,979.23 × 47,398.73
  4. Step 4: Simplify right side
    81,859.01x = 5,355,071,334.98
  5. Step 5: Solve for x
    x = 5,355,071,334.98/81,859.01
  6. Step 6: Final answer
    x = 65,418.23

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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.