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Finding the Fourth Proportional to 270,386.41, 405,637.80 and 80,861.80

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Solution

The fourth proportional to 270,386.41, 405,637.80 and 80,861.80 is: 121,310.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,386.41 : 405,637.80 = 80,861.80 : x
  2. Step 2: Convert to fraction form
    270,386.41/405,637.80 = 80,861.80/x
  3. Step 3: Cross multiply
    270,386.41x = 405,637.80 × 80,861.80
  4. Step 4: Simplify right side
    270,386.41x = 32,800,602,656.04
  5. Step 5: Solve for x
    x = 32,800,602,656.04/270,386.41
  6. Step 6: Final answer
    x = 121,310.10

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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.