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Finding the Fourth Proportional to 270,918.74, 406,395.43 and 90,996.89

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Solution

The fourth proportional to 270,918.74, 406,395.43 and 90,996.89 is: 136,501.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,918.74 : 406,395.43 = 90,996.89 : x
  2. Step 2: Convert to fraction form
    270,918.74/406,395.43 = 90,996.89/x
  3. Step 3: Cross multiply
    270,918.74x = 406,395.43 × 90,996.89
  4. Step 4: Simplify right side
    270,918.74x = 36,980,717,980.74
  5. Step 5: Solve for x
    x = 36,980,717,980.74/270,918.74
  6. Step 6: Final answer
    x = 136,501.14

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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.