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Finding the Fourth Proportional to 78,346.64, 117,495.03 and 25,743.98

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Solution

The fourth proportional to 78,346.64, 117,495.03 and 25,743.98 is: 38,607.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,346.64 : 117,495.03 = 25,743.98 : x
  2. Step 2: Convert to fraction form
    78,346.64/117,495.03 = 25,743.98/x
  3. Step 3: Cross multiply
    78,346.64x = 117,495.03 × 25,743.98
  4. Step 4: Simplify right side
    78,346.64x = 3,024,789,702.42
  5. Step 5: Solve for x
    x = 3,024,789,702.42/78,346.64
  6. Step 6: Final answer
    x = 38,607.78

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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.