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Finding the Fourth Proportional to 85,109.66, 127,424.46 and 45,037.88

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Solution

The fourth proportional to 85,109.66, 127,424.46 and 45,037.88 is: 67,429.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,109.66 : 127,424.46 = 45,037.88 : x
  2. Step 2: Convert to fraction form
    85,109.66/127,424.46 = 45,037.88/x
  3. Step 3: Cross multiply
    85,109.66x = 127,424.46 × 45,037.88
  4. Step 4: Simplify right side
    85,109.66x = 5,738,927,538.54
  5. Step 5: Solve for x
    x = 5,738,927,538.54/85,109.66
  6. Step 6: Final answer
    x = 67,429.80

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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.