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Finding the Fourth Proportional to 128,597.49, 192,825.77 and 39,826.35

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Solution

The fourth proportional to 128,597.49, 192,825.77 and 39,826.35 is: 59,717.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,597.49 : 192,825.77 = 39,826.35 : x
  2. Step 2: Convert to fraction form
    128,597.49/192,825.77 = 39,826.35/x
  3. Step 3: Cross multiply
    128,597.49x = 192,825.77 × 39,826.35
  4. Step 4: Simplify right side
    128,597.49x = 7,679,546,405.91
  5. Step 5: Solve for x
    x = 7,679,546,405.91/128,597.49
  6. Step 6: Final answer
    x = 59,717.70

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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.