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Finding the Fourth Proportional to 159,287.10, 219,812.04 and 86,691.45

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Solution

The fourth proportional to 159,287.10, 219,812.04 and 86,691.45 is: 119,631.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,287.10 : 219,812.04 = 86,691.45 : x
  2. Step 2: Convert to fraction form
    159,287.10/219,812.04 = 86,691.45/x
  3. Step 3: Cross multiply
    159,287.10x = 219,812.04 × 86,691.45
  4. Step 4: Simplify right side
    159,287.10x = 19,055,824,475.06
  5. Step 5: Solve for x
    x = 19,055,824,475.06/159,287.10
  6. Step 6: Final answer
    x = 119,631.94

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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.