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Finding the Fourth Proportional to 245,441.70, 368,071.36 and 85,476.56

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Solution

The fourth proportional to 245,441.70, 368,071.36 and 85,476.56 is: 128,183.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,441.70 : 368,071.36 = 85,476.56 : x
  2. Step 2: Convert to fraction form
    245,441.70/368,071.36 = 85,476.56/x
  3. Step 3: Cross multiply
    245,441.70x = 368,071.36 × 85,476.56
  4. Step 4: Simplify right side
    245,441.70x = 31,461,471,633.27
  5. Step 5: Solve for x
    x = 31,461,471,633.27/245,441.70
  6. Step 6: Final answer
    x = 128,183.07

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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.