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Finding the Fourth Proportional to 515,090.80, 772,636.20 and 136,010.80

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Solution

The fourth proportional to 515,090.80, 772,636.20 and 136,010.80 is: 204,016.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,090.80 : 772,636.20 = 136,010.80 : x
  2. Step 2: Convert to fraction form
    515,090.80/772,636.20 = 136,010.80/x
  3. Step 3: Cross multiply
    515,090.80x = 772,636.20 × 136,010.80
  4. Step 4: Simplify right side
    515,090.80x = 105,086,867,670.96
  5. Step 5: Solve for x
    x = 105,086,867,670.96/515,090.80
  6. Step 6: Final answer
    x = 204,016.20

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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.