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Finding the Fourth Proportional to 201,125.74, 301,684.65 and 81,179.50

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Solution

The fourth proportional to 201,125.74, 301,684.65 and 81,179.50 is: 121,767.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,125.74 : 301,684.65 = 81,179.50 : x
  2. Step 2: Convert to fraction form
    201,125.74/301,684.65 = 81,179.50/x
  3. Step 3: Cross multiply
    201,125.74x = 301,684.65 × 81,179.50
  4. Step 4: Simplify right side
    201,125.74x = 24,490,609,117.36
  5. Step 5: Solve for x
    x = 24,490,609,117.36/201,125.74
  6. Step 6: Final answer
    x = 121,767.65

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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.