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Finding the Fourth Proportional to 84,484.30, 126,754.62 and 28,330

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Solution

The fourth proportional to 84,484.30, 126,754.62 and 28,330 is: 42,504.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,484.30 : 126,754.62 = 28,330 : x
  2. Step 2: Convert to fraction form
    84,484.30/126,754.62 = 28,330/x
  3. Step 3: Cross multiply
    84,484.30x = 126,754.62 × 28,330
  4. Step 4: Simplify right side
    84,484.30x = 3,590,958,384.60
  5. Step 5: Solve for x
    x = 3,590,958,384.60/84,484.30
  6. Step 6: Final answer
    x = 42,504.45

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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.