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Finding the Fourth Proportional to 56,728, 78,304.08 and 34,372

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Solution

The fourth proportional to 56,728, 78,304.08 and 34,372 is: 47,445.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,728 : 78,304.08 = 34,372 : x
  2. Step 2: Convert to fraction form
    56,728/78,304.08 = 34,372/x
  3. Step 3: Cross multiply
    56,728x = 78,304.08 × 34,372
  4. Step 4: Simplify right side
    56,728x = 2,691,467,837.76
  5. Step 5: Solve for x
    x = 2,691,467,837.76/56,728
  6. Step 6: Final answer
    x = 47,445.14

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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.