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Finding the Fourth Proportional to 196,690.20, 295,156.80 and 78,349.20

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Solution

The fourth proportional to 196,690.20, 295,156.80 and 78,349.20 is: 117,572.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    196,690.20 : 295,156.80 = 78,349.20 : x
  2. Step 2: Convert to fraction form
    196,690.20/295,156.80 = 78,349.20/x
  3. Step 3: Cross multiply
    196,690.20x = 295,156.80 × 78,349.20
  4. Step 4: Simplify right side
    196,690.20x = 23,125,299,154.56
  5. Step 5: Solve for x
    x = 23,125,299,154.56/196,690.20
  6. Step 6: Final answer
    x = 117,572.20

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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.