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Finding the Fourth Proportional to 245,280.62, 367,966.56 and 85,349.90

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Solution

The fourth proportional to 245,280.62, 367,966.56 and 85,349.90 is: 128,040.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,280.62 : 367,966.56 = 85,349.90 : x
  2. Step 2: Convert to fraction form
    245,280.62/367,966.56 = 85,349.90/x
  3. Step 3: Cross multiply
    245,280.62x = 367,966.56 × 85,349.90
  4. Step 4: Simplify right side
    245,280.62x = 31,405,909,099.34
  5. Step 5: Solve for x
    x = 31,405,909,099.34/245,280.62
  6. Step 6: Final answer
    x = 128,040.73

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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.