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Finding the Fourth Proportional to 220,613.76, 304,430.40 and 129,975.84

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Solution

The fourth proportional to 220,613.76, 304,430.40 and 129,975.84 is: 179,356.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,613.76 : 304,430.40 = 129,975.84 : x
  2. Step 2: Convert to fraction form
    220,613.76/304,430.40 = 129,975.84/x
  3. Step 3: Cross multiply
    220,613.76x = 304,430.40 × 129,975.84
  4. Step 4: Simplify right side
    220,613.76x = 39,568,596,961.54
  5. Step 5: Solve for x
    x = 39,568,596,961.54/220,613.76
  6. Step 6: Final answer
    x = 179,356.89

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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.