Home / 81,564.42-112,221.84-66,113.28

Finding the Fourth Proportional to 81,564.42, 112,221.84 and 66,113.28

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Solution

The fourth proportional to 81,564.42, 112,221.84 and 66,113.28 is: 90,963.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,564.42 : 112,221.84 = 66,113.28 : x
  2. Step 2: Convert to fraction form
    81,564.42/112,221.84 = 66,113.28/x
  3. Step 3: Cross multiply
    81,564.42x = 112,221.84 × 66,113.28
  4. Step 4: Simplify right side
    81,564.42x = 7,419,353,930.04
  5. Step 5: Solve for x
    x = 7,419,353,930.04/81,564.42
  6. Step 6: Final answer
    x = 90,963.12

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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.