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Finding the Fourth Proportional to 81,074.62, 111,913.62 and 63,802.18

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Solution

The fourth proportional to 81,074.62, 111,913.62 and 63,802.18 is: 88,071.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,074.62 : 111,913.62 = 63,802.18 : x
  2. Step 2: Convert to fraction form
    81,074.62/111,913.62 = 63,802.18/x
  3. Step 3: Cross multiply
    81,074.62x = 111,913.62 × 63,802.18
  4. Step 4: Simplify right side
    81,074.62x = 7,140,332,927.69
  5. Step 5: Solve for x
    x = 7,140,332,927.69/81,074.62
  6. Step 6: Final answer
    x = 88,071.12

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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.