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Finding the Fourth Proportional to 159,559.40, 220,187.63 and 87,939.41

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Solution

The fourth proportional to 159,559.40, 220,187.63 and 87,939.41 is: 121,353.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,559.40 : 220,187.63 = 87,939.41 : x
  2. Step 2: Convert to fraction form
    159,559.40/220,187.63 = 87,939.41/x
  3. Step 3: Cross multiply
    159,559.40x = 220,187.63 × 87,939.41
  4. Step 4: Simplify right side
    159,559.40x = 19,363,168,730.86
  5. Step 5: Solve for x
    x = 19,363,168,730.86/159,559.40
  6. Step 6: Final answer
    x = 121,353.99

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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.