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Finding the Fourth Proportional to 131,728.79, 197,593.32 and 61,657.31

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Solution

The fourth proportional to 131,728.79, 197,593.32 and 61,657.31 is: 92,486.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,728.79 : 197,593.32 = 61,657.31 : x
  2. Step 2: Convert to fraction form
    131,728.79/197,593.32 = 61,657.31/x
  3. Step 3: Cross multiply
    131,728.79x = 197,593.32 × 61,657.31
  4. Step 4: Simplify right side
    131,728.79x = 12,183,071,597.20
  5. Step 5: Solve for x
    x = 12,183,071,597.20/131,728.79
  6. Step 6: Final answer
    x = 92,486.02

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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.