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Finding the Fourth Proportional to 243,316.69, 335,736.20 and 135,887.15

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Solution

The fourth proportional to 243,316.69, 335,736.20 and 135,887.15 is: 187,501.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,316.69 : 335,736.20 = 135,887.15 : x
  2. Step 2: Convert to fraction form
    243,316.69/335,736.20 = 135,887.15/x
  3. Step 3: Cross multiply
    243,316.69x = 335,736.20 × 135,887.15
  4. Step 4: Simplify right side
    243,316.69x = 45,622,236,548.89
  5. Step 5: Solve for x
    x = 45,622,236,548.89/243,316.69
  6. Step 6: Final answer
    x = 187,501.47

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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.