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Finding the Fourth Proportional to 128,715.94, 193,141.21 and 93,468.39

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Solution

The fourth proportional to 128,715.94, 193,141.21 and 93,468.39 is: 140,251.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,715.94 : 193,141.21 = 93,468.39 : x
  2. Step 2: Convert to fraction form
    128,715.94/193,141.21 = 93,468.39/x
  3. Step 3: Cross multiply
    128,715.94x = 193,141.21 × 93,468.39
  4. Step 4: Simplify right side
    128,715.94x = 18,052,597,941.35
  5. Step 5: Solve for x
    x = 18,052,597,941.35/128,715.94
  6. Step 6: Final answer
    x = 140,251.46

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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.