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Finding the Fourth Proportional to 81,759.82, 112,859.39 and 47,779.38

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Solution

The fourth proportional to 81,759.82, 112,859.39 and 47,779.38 is: 65,953.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,759.82 : 112,859.39 = 47,779.38 : x
  2. Step 2: Convert to fraction form
    81,759.82/112,859.39 = 47,779.38/x
  3. Step 3: Cross multiply
    81,759.82x = 112,859.39 × 47,779.38
  4. Step 4: Simplify right side
    81,759.82x = 5,392,351,681.38
  5. Step 5: Solve for x
    x = 5,392,351,681.38/81,759.82
  6. Step 6: Final answer
    x = 65,953.57

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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.