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Finding the Fourth Proportional to 154,287.65, 212,936.67 and 86,308.40

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Solution

The fourth proportional to 154,287.65, 212,936.67 and 86,308.40 is: 119,116.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,287.65 : 212,936.67 = 86,308.40 : x
  2. Step 2: Convert to fraction form
    154,287.65/212,936.67 = 86,308.40/x
  3. Step 3: Cross multiply
    154,287.65x = 212,936.67 × 86,308.40
  4. Step 4: Simplify right side
    154,287.65x = 18,378,222,224.34
  5. Step 5: Solve for x
    x = 18,378,222,224.34/154,287.65
  6. Step 6: Final answer
    x = 119,116.62

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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.