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Finding the Fourth Proportional to 128,498.58, 192,637.02 and 61,847.02

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Solution

The fourth proportional to 128,498.58, 192,637.02 and 61,847.02 is: 92,717.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,498.58 : 192,637.02 = 61,847.02 : x
  2. Step 2: Convert to fraction form
    128,498.58/192,637.02 = 61,847.02/x
  3. Step 3: Cross multiply
    128,498.58x = 192,637.02 × 61,847.02
  4. Step 4: Simplify right side
    128,498.58x = 11,914,025,628.68
  5. Step 5: Solve for x
    x = 11,914,025,628.68/128,498.58
  6. Step 6: Final answer
    x = 92,717.18

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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.