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Finding the Fourth Proportional to 128,068.52, 192,074.08 and 39,322.80

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Solution

The fourth proportional to 128,068.52, 192,074.08 and 39,322.80 is: 58,975.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,068.52 : 192,074.08 = 39,322.80 : x
  2. Step 2: Convert to fraction form
    128,068.52/192,074.08 = 39,322.80/x
  3. Step 3: Cross multiply
    128,068.52x = 192,074.08 × 39,322.80
  4. Step 4: Simplify right side
    128,068.52x = 7,552,890,633.02
  5. Step 5: Solve for x
    x = 7,552,890,633.02/128,068.52
  6. Step 6: Final answer
    x = 58,975.39

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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.