Home / 155,786.79-214,986.71-86,880.61

Finding the Fourth Proportional to 155,786.79, 214,986.71 and 86,880.61

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Solution

The fourth proportional to 155,786.79, 214,986.71 and 86,880.61 is: 119,895.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,786.79 : 214,986.71 = 86,880.61 : x
  2. Step 2: Convert to fraction form
    155,786.79/214,986.71 = 86,880.61/x
  3. Step 3: Cross multiply
    155,786.79x = 214,986.71 × 86,880.61
  4. Step 4: Simplify right side
    155,786.79x = 18,678,174,997.36
  5. Step 5: Solve for x
    x = 18,678,174,997.36/155,786.79
  6. Step 6: Final answer
    x = 119,895.76

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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.