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Finding the Fourth Proportional to 81,097.76, 121,668.78 and 39,013.04

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Solution

The fourth proportional to 81,097.76, 121,668.78 and 39,013.04 is: 58,530.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,097.76 : 121,668.78 = 39,013.04 : x
  2. Step 2: Convert to fraction form
    81,097.76/121,668.78 = 39,013.04/x
  3. Step 3: Cross multiply
    81,097.76x = 121,668.78 × 39,013.04
  4. Step 4: Simplify right side
    81,097.76x = 4,746,668,980.89
  5. Step 5: Solve for x
    x = 4,746,668,980.89/81,097.76
  6. Step 6: Final answer
    x = 58,530.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.