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Finding the Fourth Proportional to 128,401.14, 192,602.31 and 45,295.14

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Solution

The fourth proportional to 128,401.14, 192,602.31 and 45,295.14 is: 67,942.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,401.14 : 192,602.31 = 45,295.14 : x
  2. Step 2: Convert to fraction form
    128,401.14/192,602.31 = 45,295.14/x
  3. Step 3: Cross multiply
    128,401.14x = 192,602.31 × 45,295.14
  4. Step 4: Simplify right side
    128,401.14x = 8,723,948,595.77
  5. Step 5: Solve for x
    x = 8,723,948,595.77/128,401.14
  6. Step 6: Final answer
    x = 67,942.92

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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.