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Finding the Fourth Proportional to 136,142.61, 203,775.90 and 72,804.25

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Solution

The fourth proportional to 136,142.61, 203,775.90 and 72,804.25 is: 108,972.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,142.61 : 203,775.90 = 72,804.25 : x
  2. Step 2: Convert to fraction form
    136,142.61/203,775.90 = 72,804.25/x
  3. Step 3: Cross multiply
    136,142.61x = 203,775.90 × 72,804.25
  4. Step 4: Simplify right side
    136,142.61x = 14,835,751,567.58
  5. Step 5: Solve for x
    x = 14,835,751,567.58/136,142.61
  6. Step 6: Final answer
    x = 108,972.14

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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.