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Finding the Fourth Proportional to 128,335.64, 192,343.07 and 61,757.89

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Solution

The fourth proportional to 128,335.64, 192,343.07 and 61,757.89 is: 92,559.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,335.64 : 192,343.07 = 61,757.89 : x
  2. Step 2: Convert to fraction form
    128,335.64/192,343.07 = 61,757.89/x
  3. Step 3: Cross multiply
    128,335.64x = 192,343.07 × 61,757.89
  4. Step 4: Simplify right side
    128,335.64x = 11,878,701,832.86
  5. Step 5: Solve for x
    x = 11,878,701,832.86/128,335.64
  6. Step 6: Final answer
    x = 92,559.65

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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.