Home / 155,299.18-214,310.05-86,388.31

Finding the Fourth Proportional to 155,299.18, 214,310.05 and 86,388.31

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Solution

The fourth proportional to 155,299.18, 214,310.05 and 86,388.31 is: 119,214.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,299.18 : 214,310.05 = 86,388.31 : x
  2. Step 2: Convert to fraction form
    155,299.18/214,310.05 = 86,388.31/x
  3. Step 3: Cross multiply
    155,299.18x = 214,310.05 × 86,388.31
  4. Step 4: Simplify right side
    155,299.18x = 18,513,882,317.94
  5. Step 5: Solve for x
    x = 18,513,882,317.94/155,299.18
  6. Step 6: Final answer
    x = 119,214.29

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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.