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Finding the Fourth Proportional to 159,544.65, 220,171.67 and 86,947.58

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Solution

The fourth proportional to 159,544.65, 220,171.67 and 86,947.58 is: 119,987.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,544.65 : 220,171.67 = 86,947.58 : x
  2. Step 2: Convert to fraction form
    159,544.65/220,171.67 = 86,947.58/x
  3. Step 3: Cross multiply
    159,544.65x = 220,171.67 × 86,947.58
  4. Step 4: Simplify right side
    159,544.65x = 19,143,393,094.34
  5. Step 5: Solve for x
    x = 19,143,393,094.34/159,544.65
  6. Step 6: Final answer
    x = 119,987.68

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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.