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Finding the Fourth Proportional to 131,393.88, 197,122.20 and 42,647.64

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Solution

The fourth proportional to 131,393.88, 197,122.20 and 42,647.64 is: 63,981.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,393.88 : 197,122.20 = 42,647.64 : x
  2. Step 2: Convert to fraction form
    131,393.88/197,122.20 = 42,647.64/x
  3. Step 3: Cross multiply
    131,393.88x = 197,122.20 × 42,647.64
  4. Step 4: Simplify right side
    131,393.88x = 8,406,796,621.61
  5. Step 5: Solve for x
    x = 8,406,796,621.61/131,393.88
  6. Step 6: Final answer
    x = 63,981.65

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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.