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Finding the Fourth Proportional to 128,597.36, 192,894.24 and 78,008.44

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Solution

The fourth proportional to 128,597.36, 192,894.24 and 78,008.44 is: 117,011.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,597.36 : 192,894.24 = 78,008.44 : x
  2. Step 2: Convert to fraction form
    128,597.36/192,894.24 = 78,008.44/x
  3. Step 3: Cross multiply
    128,597.36x = 192,894.24 × 78,008.44
  4. Step 4: Simplify right side
    128,597.36x = 15,047,378,747.39
  5. Step 5: Solve for x
    x = 15,047,378,747.39/128,597.36
  6. Step 6: Final answer
    x = 117,011.57

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1.5x scale

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.