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Finding the Fourth Proportional to 72,187.80, 108,152.10 and 63,893.40

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Solution

The fourth proportional to 72,187.80, 108,152.10 and 63,893.40 is: 95,725.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,187.80 : 108,152.10 = 63,893.40 : x
  2. Step 2: Convert to fraction form
    72,187.80/108,152.10 = 63,893.40/x
  3. Step 3: Cross multiply
    72,187.80x = 108,152.10 × 63,893.40
  4. Step 4: Simplify right side
    72,187.80x = 6,910,205,386.14
  5. Step 5: Solve for x
    x = 6,910,205,386.14/72,187.80
  6. Step 6: Final answer
    x = 95,725.39

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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.