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Finding the Fourth Proportional to 159,021.98, 219,454.96 and 87,406.64

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Solution

The fourth proportional to 159,021.98, 219,454.96 and 87,406.64 is: 120,623.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,021.98 : 219,454.96 = 87,406.64 : x
  2. Step 2: Convert to fraction form
    159,021.98/219,454.96 = 87,406.64/x
  3. Step 3: Cross multiply
    159,021.98x = 219,454.96 × 87,406.64
  4. Step 4: Simplify right side
    159,021.98x = 19,181,820,684.93
  5. Step 5: Solve for x
    x = 19,181,820,684.93/159,021.98
  6. Step 6: Final answer
    x = 120,623.71

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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.