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Finding the Fourth Proportional to 128,606.28, 192,935.04 and 39,887.04

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Solution

The fourth proportional to 128,606.28, 192,935.04 and 39,887.04 is: 59,838.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,606.28 : 192,935.04 = 39,887.04 : x
  2. Step 2: Convert to fraction form
    128,606.28/192,935.04 = 39,887.04/x
  3. Step 3: Cross multiply
    128,606.28x = 192,935.04 × 39,887.04
  4. Step 4: Simplify right side
    128,606.28x = 7,695,607,657.88
  5. Step 5: Solve for x
    x = 7,695,607,657.88/128,606.28
  6. Step 6: Final answer
    x = 59,838.51

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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.