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Finding the Fourth Proportional to 308,071.80, 462,107.70 and 86,455.80

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Solution

The fourth proportional to 308,071.80, 462,107.70 and 86,455.80 is: 129,683.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,071.80 : 462,107.70 = 86,455.80 : x
  2. Step 2: Convert to fraction form
    308,071.80/462,107.70 = 86,455.80/x
  3. Step 3: Cross multiply
    308,071.80x = 462,107.70 × 86,455.80
  4. Step 4: Simplify right side
    308,071.80x = 39,951,890,889.66
  5. Step 5: Solve for x
    x = 39,951,890,889.66/308,071.80
  6. Step 6: Final answer
    x = 129,683.70

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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.