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Finding the Fourth Proportional to 274,402.55, 411,617.63 and 87,428.63

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Solution

The fourth proportional to 274,402.55, 411,617.63 and 87,428.63 is: 131,147.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,402.55 : 411,617.63 = 87,428.63 : x
  2. Step 2: Convert to fraction form
    274,402.55/411,617.63 = 87,428.63/x
  3. Step 3: Cross multiply
    274,402.55x = 411,617.63 × 87,428.63
  4. Step 4: Simplify right side
    274,402.55x = 35,987,166,722.36
  5. Step 5: Solve for x
    x = 35,987,166,722.36/274,402.55
  6. Step 6: Final answer
    x = 131,147.35

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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.