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Finding the Fourth Proportional to 128,000.70, 192,001.05 and 109,338.30

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Solution

The fourth proportional to 128,000.70, 192,001.05 and 109,338.30 is: 164,007.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,000.70 : 192,001.05 = 109,338.30 : x
  2. Step 2: Convert to fraction form
    128,000.70/192,001.05 = 109,338.30/x
  3. Step 3: Cross multiply
    128,000.70x = 192,001.05 × 109,338.30
  4. Step 4: Simplify right side
    128,000.70x = 20,993,068,405.22
  5. Step 5: Solve for x
    x = 20,993,068,405.22/128,000.70
  6. Step 6: Final answer
    x = 164,007.45

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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.