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Finding the Fourth Proportional to 98,375.69, 135,746.12 and 55,349.88

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Solution

The fourth proportional to 98,375.69, 135,746.12 and 55,349.88 is: 76,375.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,375.69 : 135,746.12 = 55,349.88 : x
  2. Step 2: Convert to fraction form
    98,375.69/135,746.12 = 55,349.88/x
  3. Step 3: Cross multiply
    98,375.69x = 135,746.12 × 55,349.88
  4. Step 4: Simplify right side
    98,375.69x = 7,513,531,175.72
  5. Step 5: Solve for x
    x = 7,513,531,175.72/98,375.69
  6. Step 6: Final answer
    x = 76,375.90

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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.