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Finding the Fourth Proportional to 73,720.38, 110,515.08 and 28,731.32

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Solution

The fourth proportional to 73,720.38, 110,515.08 and 28,731.32 is: 43,071.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,720.38 : 110,515.08 = 28,731.32 : x
  2. Step 2: Convert to fraction form
    73,720.38/110,515.08 = 28,731.32/x
  3. Step 3: Cross multiply
    73,720.38x = 110,515.08 × 28,731.32
  4. Step 4: Simplify right side
    73,720.38x = 3,175,244,128.31
  5. Step 5: Solve for x
    x = 3,175,244,128.31/73,720.38
  6. Step 6: Final answer
    x = 43,071.46

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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.