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Finding the Fourth Proportional to 159,532.78, 220,152.42 and 86,936.33

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Solution

The fourth proportional to 159,532.78, 220,152.42 and 86,936.33 is: 119,970.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,532.78 : 220,152.42 = 86,936.33 : x
  2. Step 2: Convert to fraction form
    159,532.78/220,152.42 = 86,936.33/x
  3. Step 3: Cross multiply
    159,532.78x = 220,152.42 × 86,936.33
  4. Step 4: Simplify right side
    159,532.78x = 19,139,242,315.60
  5. Step 5: Solve for x
    x = 19,139,242,315.60/159,532.78
  6. Step 6: Final answer
    x = 119,970.59

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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.