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Finding the Fourth Proportional to 81,504, 112,439.88 and 57,651.12

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Solution

The fourth proportional to 81,504, 112,439.88 and 57,651.12 is: 79,533.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,504 : 112,439.88 = 57,651.12 : x
  2. Step 2: Convert to fraction form
    81,504/112,439.88 = 57,651.12/x
  3. Step 3: Cross multiply
    81,504x = 112,439.88 × 57,651.12
  4. Step 4: Simplify right side
    81,504x = 6,482,285,014.67
  5. Step 5: Solve for x
    x = 6,482,285,014.67/81,504
  6. Step 6: Final answer
    x = 79,533.34

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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.