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Finding the Fourth Proportional to 70,891.72, 97,836.12 and 39,066.32

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Solution

The fourth proportional to 70,891.72, 97,836.12 and 39,066.32 is: 53,914.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,891.72 : 97,836.12 = 39,066.32 : x
  2. Step 2: Convert to fraction form
    70,891.72/97,836.12 = 39,066.32/x
  3. Step 3: Cross multiply
    70,891.72x = 97,836.12 × 39,066.32
  4. Step 4: Simplify right side
    70,891.72x = 3,822,097,171.48
  5. Step 5: Solve for x
    x = 3,822,097,171.48/70,891.72
  6. Step 6: Final answer
    x = 53,914.58

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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.