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Finding the Fourth Proportional to 272,843,436.80, 409,268,654.40 and 91,090,614.80

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Solution

The fourth proportional to 272,843,436.80, 409,268,654.40 and 91,090,614.80 is: 136,637,090.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,843,436.80 : 409,268,654.40 = 91,090,614.80 : x
  2. Step 2: Convert to fraction form
    272,843,436.80/409,268,654.40 = 91,090,614.80/x
  3. Step 3: Cross multiply
    272,843,436.80x = 409,268,654.40 × 91,090,614.80
  4. Step 4: Simplify right side
    272,843,436.80x = 37,280,533,347,664,720
  5. Step 5: Solve for x
    x = 37,280,533,347,664,720/272,843,436.80
  6. Step 6: Final answer
    x = 136,637,090.43

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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.