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Finding the Fourth Proportional to 81,707.58, 112,768.65 and 49,894.92

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Solution

The fourth proportional to 81,707.58, 112,768.65 and 49,894.92 is: 68,862.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,707.58 : 112,768.65 = 49,894.92 : x
  2. Step 2: Convert to fraction form
    81,707.58/112,768.65 = 49,894.92/x
  3. Step 3: Cross multiply
    81,707.58x = 112,768.65 × 49,894.92
  4. Step 4: Simplify right side
    81,707.58x = 5,626,582,770.26
  5. Step 5: Solve for x
    x = 5,626,582,770.26/81,707.58
  6. Step 6: Final answer
    x = 68,862.43

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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.