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Finding the Fourth Proportional to 245,687.46, 368,541.72 and 85,779.54

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Solution

The fourth proportional to 245,687.46, 368,541.72 and 85,779.54 is: 128,672.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,687.46 : 368,541.72 = 85,779.54 : x
  2. Step 2: Convert to fraction form
    245,687.46/368,541.72 = 85,779.54/x
  3. Step 3: Cross multiply
    245,687.46x = 368,541.72 × 85,779.54
  4. Step 4: Simplify right side
    245,687.46x = 31,613,339,212.41
  5. Step 5: Solve for x
    x = 31,613,339,212.41/245,687.46
  6. Step 6: Final answer
    x = 128,672.99

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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.