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Finding the Fourth Proportional to 159,035.73, 219,475.08 and 87,421.20

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Solution

The fourth proportional to 159,035.73, 219,475.08 and 87,421.20 is: 120,644.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,035.73 : 219,475.08 = 87,421.20 : x
  2. Step 2: Convert to fraction form
    159,035.73/219,475.08 = 87,421.20/x
  3. Step 3: Cross multiply
    159,035.73x = 219,475.08 × 87,421.20
  4. Step 4: Simplify right side
    159,035.73x = 19,186,774,863.70
  5. Step 5: Solve for x
    x = 19,186,774,863.70/159,035.73
  6. Step 6: Final answer
    x = 120,644.43

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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.