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Finding the Fourth Proportional to 155,644.68, 214,795.42 and 86,740.38

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Solution

The fourth proportional to 155,644.68, 214,795.42 and 86,740.38 is: 119,704.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,644.68 : 214,795.42 = 86,740.38 : x
  2. Step 2: Convert to fraction form
    155,644.68/214,795.42 = 86,740.38/x
  3. Step 3: Cross multiply
    155,644.68x = 214,795.42 × 86,740.38
  4. Step 4: Simplify right side
    155,644.68x = 18,631,436,353.06
  5. Step 5: Solve for x
    x = 18,631,436,353.06/155,644.68
  6. Step 6: Final answer
    x = 119,704.94

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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.