Home / 86,939.83-130,217.07-66,801.09

Finding the Fourth Proportional to 86,939.83, 130,217.07 and 66,801.09

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Solution

The fourth proportional to 86,939.83, 130,217.07 and 66,801.09 is: 100,053.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,939.83 : 130,217.07 = 66,801.09 : x
  2. Step 2: Convert to fraction form
    86,939.83/130,217.07 = 66,801.09/x
  3. Step 3: Cross multiply
    86,939.83x = 130,217.07 × 66,801.09
  4. Step 4: Simplify right side
    86,939.83x = 8,698,641,473.79
  5. Step 5: Solve for x
    x = 8,698,641,473.79/86,939.83
  6. Step 6: Final answer
    x = 100,053.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.