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Finding the Fourth Proportional to 98,436.88, 135,841 and 53,725.20

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Solution

The fourth proportional to 98,436.88, 135,841 and 53,725.20 is: 74,139.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,436.88 : 135,841 = 53,725.20 : x
  2. Step 2: Convert to fraction form
    98,436.88/135,841 = 53,725.20/x
  3. Step 3: Cross multiply
    98,436.88x = 135,841 × 53,725.20
  4. Step 4: Simplify right side
    98,436.88x = 7,298,084,893.20
  5. Step 5: Solve for x
    x = 7,298,084,893.20/98,436.88
  6. Step 6: Final answer
    x = 74,139.74

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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.