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Finding the Fourth Proportional to 218,776.41, 301,978.19 and 126,918.90

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Solution

The fourth proportional to 218,776.41, 301,978.19 and 126,918.90 is: 175,186.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,776.41 : 301,978.19 = 126,918.90 : x
  2. Step 2: Convert to fraction form
    218,776.41/301,978.19 = 126,918.90/x
  3. Step 3: Cross multiply
    218,776.41x = 301,978.19 × 126,918.90
  4. Step 4: Simplify right side
    218,776.41x = 38,326,740,016.09
  5. Step 5: Solve for x
    x = 38,326,740,016.09/218,776.41
  6. Step 6: Final answer
    x = 175,186.80

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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.