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Finding the Fourth Proportional to 159,533.88, 220,155.80 and 86,936.61

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Solution

The fourth proportional to 159,533.88, 220,155.80 and 86,936.61 is: 119,972.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,533.88 : 220,155.80 = 86,936.61 : x
  2. Step 2: Convert to fraction form
    159,533.88/220,155.80 = 86,936.61/x
  3. Step 3: Cross multiply
    159,533.88x = 220,155.80 × 86,936.61
  4. Step 4: Simplify right side
    159,533.88x = 19,139,598,923.84
  5. Step 5: Solve for x
    x = 19,139,598,923.84/159,533.88
  6. Step 6: Final answer
    x = 119,972.00

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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.