Home / 81,720.97-112,764.63-47,721.49

Finding the Fourth Proportional to 81,720.97, 112,764.63 and 47,721.49

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Solution

The fourth proportional to 81,720.97, 112,764.63 and 47,721.49 is: 65,849.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,720.97 : 112,764.63 = 47,721.49 : x
  2. Step 2: Convert to fraction form
    81,720.97/112,764.63 = 47,721.49/x
  3. Step 3: Cross multiply
    81,720.97x = 112,764.63 × 47,721.49
  4. Step 4: Simplify right side
    81,720.97x = 5,381,296,162.90
  5. Step 5: Solve for x
    x = 5,381,296,162.90/81,720.97
  6. Step 6: Final answer
    x = 65,849.64

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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.