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Finding the Fourth Proportional to 159,615.99, 220,271.54 and 87,998.58

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Solution

The fourth proportional to 159,615.99, 220,271.54 and 87,998.58 is: 121,438.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,615.99 : 220,271.54 = 87,998.58 : x
  2. Step 2: Convert to fraction form
    159,615.99/220,271.54 = 87,998.58/x
  3. Step 3: Cross multiply
    159,615.99x = 220,271.54 × 87,998.58
  4. Step 4: Simplify right side
    159,615.99x = 19,383,582,294.42
  5. Step 5: Solve for x
    x = 19,383,582,294.42/159,615.99
  6. Step 6: Final answer
    x = 121,438.85

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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.