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Finding the Fourth Proportional to 159,647.77, 220,345.85 and 91,711.33

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Solution

The fourth proportional to 159,647.77, 220,345.85 and 91,711.33 is: 126,579.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,647.77 : 220,345.85 = 91,711.33 : x
  2. Step 2: Convert to fraction form
    159,647.77/220,345.85 = 91,711.33/x
  3. Step 3: Cross multiply
    159,647.77x = 220,345.85 × 91,711.33
  4. Step 4: Simplify right side
    159,647.77x = 20,208,210,963.48
  5. Step 5: Solve for x
    x = 20,208,210,963.48/159,647.77
  6. Step 6: Final answer
    x = 126,579.98

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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.