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Finding the Fourth Proportional to 81,574.87, 112,594.01 and 55,743.88

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Solution

The fourth proportional to 81,574.87, 112,594.01 and 55,743.88 is: 76,940.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,574.87 : 112,594.01 = 55,743.88 : x
  2. Step 2: Convert to fraction form
    81,574.87/112,594.01 = 55,743.88/x
  3. Step 3: Cross multiply
    81,574.87x = 112,594.01 × 55,743.88
  4. Step 4: Simplify right side
    81,574.87x = 6,276,426,419.19
  5. Step 5: Solve for x
    x = 6,276,426,419.19/81,574.87
  6. Step 6: Final answer
    x = 76,940.69

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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.