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Finding the Fourth Proportional to 159,703.08, 220,389.83 and 91,724.45

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Solution

The fourth proportional to 159,703.08, 220,389.83 and 91,724.45 is: 126,579.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,703.08 : 220,389.83 = 91,724.45 : x
  2. Step 2: Convert to fraction form
    159,703.08/220,389.83 = 91,724.45/x
  3. Step 3: Cross multiply
    159,703.08x = 220,389.83 × 91,724.45
  4. Step 4: Simplify right side
    159,703.08x = 20,215,134,381.77
  5. Step 5: Solve for x
    x = 20,215,134,381.77/159,703.08
  6. Step 6: Final answer
    x = 126,579.49

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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.