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Finding the Fourth Proportional to 159,008.72, 219,436.20 and 87,390.64

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Solution

The fourth proportional to 159,008.72, 219,436.20 and 87,390.64 is: 120,601.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,008.72 : 219,436.20 = 87,390.64 : x
  2. Step 2: Convert to fraction form
    159,008.72/219,436.20 = 87,390.64/x
  3. Step 3: Cross multiply
    159,008.72x = 219,436.20 × 87,390.64
  4. Step 4: Simplify right side
    159,008.72x = 19,176,669,957.17
  5. Step 5: Solve for x
    x = 19,176,669,957.17/159,008.72
  6. Step 6: Final answer
    x = 120,601.37

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1.5x scale

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.