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Finding the Fourth Proportional to 81,077.82, 111,878.88 and 47,079.66

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Solution

The fourth proportional to 81,077.82, 111,878.88 and 47,079.66 is: 64,964.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,077.82 : 111,878.88 = 47,079.66 : x
  2. Step 2: Convert to fraction form
    81,077.82/111,878.88 = 47,079.66/x
  3. Step 3: Cross multiply
    81,077.82x = 111,878.88 × 47,079.66
  4. Step 4: Simplify right side
    81,077.82x = 5,267,219,631.58
  5. Step 5: Solve for x
    x = 5,267,219,631.58/81,077.82
  6. Step 6: Final answer
    x = 64,964.99

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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.