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Finding the Fourth Proportional to 128,148.30, 192,222.45 and 120,890.70

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Solution

The fourth proportional to 128,148.30, 192,222.45 and 120,890.70 is: 181,336.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,148.30 : 192,222.45 = 120,890.70 : x
  2. Step 2: Convert to fraction form
    128,148.30/192,222.45 = 120,890.70/x
  3. Step 3: Cross multiply
    128,148.30x = 192,222.45 × 120,890.70
  4. Step 4: Simplify right side
    128,148.30x = 23,237,906,536.22
  5. Step 5: Solve for x
    x = 23,237,906,536.22/128,148.30
  6. Step 6: Final answer
    x = 181,336.05

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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.