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Finding the Fourth Proportional to 100,913.21, 151,367.04 and 43,987.08

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Solution

The fourth proportional to 100,913.21, 151,367.04 and 43,987.08 is: 65,979.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,913.21 : 151,367.04 = 43,987.08 : x
  2. Step 2: Convert to fraction form
    100,913.21/151,367.04 = 43,987.08/x
  3. Step 3: Cross multiply
    100,913.21x = 151,367.04 × 43,987.08
  4. Step 4: Simplify right side
    100,913.21x = 6,658,194,097.84
  5. Step 5: Solve for x
    x = 6,658,194,097.84/100,913.21
  6. Step 6: Final answer
    x = 65,979.41

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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.