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Finding the Fourth Proportional to 100,661.68, 151,109.16 and 54,005.68

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Solution

The fourth proportional to 100,661.68, 151,109.16 and 54,005.68 is: 81,071.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,661.68 : 151,109.16 = 54,005.68 : x
  2. Step 2: Convert to fraction form
    100,661.68/151,109.16 = 54,005.68/x
  3. Step 3: Cross multiply
    100,661.68x = 151,109.16 × 54,005.68
  4. Step 4: Simplify right side
    100,661.68x = 8,160,752,940.03
  5. Step 5: Solve for x
    x = 8,160,752,940.03/100,661.68
  6. Step 6: Final answer
    x = 81,071.10

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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.