Home / 131,259.48-180,971.58-100,668.21

Finding the Fourth Proportional to 131,259.48, 180,971.58 and 100,668.21

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Solution

The fourth proportional to 131,259.48, 180,971.58 and 100,668.21 is: 138,794.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,259.48 : 180,971.58 = 100,668.21 : x
  2. Step 2: Convert to fraction form
    131,259.48/180,971.58 = 100,668.21/x
  3. Step 3: Cross multiply
    131,259.48x = 180,971.58 × 100,668.21
  4. Step 4: Simplify right side
    131,259.48x = 18,218,085,019.47
  5. Step 5: Solve for x
    x = 18,218,085,019.47/131,259.48
  6. Step 6: Final answer
    x = 138,794.43

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1.5x scale

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.