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Finding the Fourth Proportional to 220,509.64, 330,873.80 and 87,386.95

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Solution

The fourth proportional to 220,509.64, 330,873.80 and 87,386.95 is: 131,123.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,509.64 : 330,873.80 = 87,386.95 : x
  2. Step 2: Convert to fraction form
    220,509.64/330,873.80 = 87,386.95/x
  3. Step 3: Cross multiply
    220,509.64x = 330,873.80 × 87,386.95
  4. Step 4: Simplify right side
    220,509.64x = 28,914,052,216.91
  5. Step 5: Solve for x
    x = 28,914,052,216.91/220,509.64
  6. Step 6: Final answer
    x = 131,123.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.