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Finding the Fourth Proportional to 243,059.12, 335,420.96 and 135,628

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Solution

The fourth proportional to 243,059.12, 335,420.96 and 135,628 is: 187,166.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,059.12 : 335,420.96 = 135,628 : x
  2. Step 2: Convert to fraction form
    243,059.12/335,420.96 = 135,628/x
  3. Step 3: Cross multiply
    243,059.12x = 335,420.96 × 135,628
  4. Step 4: Simplify right side
    243,059.12x = 45,492,473,962.88
  5. Step 5: Solve for x
    x = 45,492,473,962.88/243,059.12
  6. Step 6: Final answer
    x = 187,166.29

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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.