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Finding the Fourth Proportional to 78,372.54, 108,154.08 and 42,562.58

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Solution

The fourth proportional to 78,372.54, 108,154.08 and 42,562.58 is: 58,736.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,372.54 : 108,154.08 = 42,562.58 : x
  2. Step 2: Convert to fraction form
    78,372.54/108,154.08 = 42,562.58/x
  3. Step 3: Cross multiply
    78,372.54x = 108,154.08 × 42,562.58
  4. Step 4: Simplify right side
    78,372.54x = 4,603,316,141.56
  5. Step 5: Solve for x
    x = 4,603,316,141.56/78,372.54
  6. Step 6: Final answer
    x = 58,736.34

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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.