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Finding the Fourth Proportional to 159,139.96, 219,608.94 and 86,540.80

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Solution

The fourth proportional to 159,139.96, 219,608.94 and 86,540.80 is: 119,424.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,139.96 : 219,608.94 = 86,540.80 : x
  2. Step 2: Convert to fraction form
    159,139.96/219,608.94 = 86,540.80/x
  3. Step 3: Cross multiply
    159,139.96x = 219,608.94 × 86,540.80
  4. Step 4: Simplify right side
    159,139.96x = 19,005,133,354.75
  5. Step 5: Solve for x
    x = 19,005,133,354.75/159,139.96
  6. Step 6: Final answer
    x = 119,424.02

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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.