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Finding the Fourth Proportional to 159,380.65, 219,940.88 and 86,784.81

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Solution

The fourth proportional to 159,380.65, 219,940.88 and 86,784.81 is: 119,760.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,380.65 : 219,940.88 = 86,784.81 : x
  2. Step 2: Convert to fraction form
    159,380.65/219,940.88 = 86,784.81/x
  3. Step 3: Cross multiply
    159,380.65x = 219,940.88 × 86,784.81
  4. Step 4: Simplify right side
    159,380.65x = 19,087,527,482.03
  5. Step 5: Solve for x
    x = 19,087,527,482.03/159,380.65
  6. Step 6: Final answer
    x = 119,760.63

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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.