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Finding the Fourth Proportional to 128,047.45, 192,071.18 and 34,553.05

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Solution

The fourth proportional to 128,047.45, 192,071.18 and 34,553.05 is: 51,829.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,047.45 : 192,071.18 = 34,553.05 : x
  2. Step 2: Convert to fraction form
    128,047.45/192,071.18 = 34,553.05/x
  3. Step 3: Cross multiply
    128,047.45x = 192,071.18 × 34,553.05
  4. Step 4: Simplify right side
    128,047.45x = 6,636,644,913.33
  5. Step 5: Solve for x
    x = 6,636,644,913.33/128,047.45
  6. Step 6: Final answer
    x = 51,829.58

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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.