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Finding the Fourth Proportional to 94,709.76, 142,128 and 39,305.76

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Solution

The fourth proportional to 94,709.76, 142,128 and 39,305.76 is: 58,984.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    94,709.76 : 142,128 = 39,305.76 : x
  2. Step 2: Convert to fraction form
    94,709.76/142,128 = 39,305.76/x
  3. Step 3: Cross multiply
    94,709.76x = 142,128 × 39,305.76
  4. Step 4: Simplify right side
    94,709.76x = 5,586,449,057.28
  5. Step 5: Solve for x
    x = 5,586,449,057.28/94,709.76
  6. Step 6: Final answer
    x = 58,984.94

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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.