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Finding the Fourth Proportional to 245,434.55, 368,060.68 and 85,469.42

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Solution

The fourth proportional to 245,434.55, 368,060.68 and 85,469.42 is: 128,172.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,434.55 : 368,060.68 = 85,469.42 : x
  2. Step 2: Convert to fraction form
    245,434.55/368,060.68 = 85,469.42/x
  3. Step 3: Cross multiply
    245,434.55x = 368,060.68 × 85,469.42
  4. Step 4: Simplify right side
    245,434.55x = 31,457,932,844.41
  5. Step 5: Solve for x
    x = 31,457,932,844.41/245,434.55
  6. Step 6: Final answer
    x = 128,172.39

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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.