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Finding the Fourth Proportional to 159,580.90, 220,218.65 and 86,984.48

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Solution

The fourth proportional to 159,580.90, 220,218.65 and 86,984.48 is: 120,036.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,580.90 : 220,218.65 = 86,984.48 : x
  2. Step 2: Convert to fraction form
    159,580.90/220,218.65 = 86,984.48/x
  3. Step 3: Cross multiply
    159,580.90x = 220,218.65 × 86,984.48
  4. Step 4: Simplify right side
    159,580.90x = 19,155,605,198.37
  5. Step 5: Solve for x
    x = 19,155,605,198.37/159,580.90
  6. Step 6: Final answer
    x = 120,036.95

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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.