Home / 81,577.14-112,611.78-76,470.36

Finding the Fourth Proportional to 81,577.14, 112,611.78 and 76,470.36

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Solution

The fourth proportional to 81,577.14, 112,611.78 and 76,470.36 is: 105,562.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,577.14 : 112,611.78 = 76,470.36 : x
  2. Step 2: Convert to fraction form
    81,577.14/112,611.78 = 76,470.36/x
  3. Step 3: Cross multiply
    81,577.14x = 112,611.78 × 76,470.36
  4. Step 4: Simplify right side
    81,577.14x = 8,611,463,356.84
  5. Step 5: Solve for x
    x = 8,611,463,356.84/81,577.14
  6. Step 6: Final answer
    x = 105,562.21

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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.