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Finding the Fourth Proportional to 208,812.60, 313,391.70 and 96,665.40

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Solution

The fourth proportional to 208,812.60, 313,391.70 and 96,665.40 is: 145,078.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,812.60 : 313,391.70 = 96,665.40 : x
  2. Step 2: Convert to fraction form
    208,812.60/313,391.70 = 96,665.40/x
  3. Step 3: Cross multiply
    208,812.60x = 313,391.70 × 96,665.40
  4. Step 4: Simplify right side
    208,812.60x = 30,294,134,037.18
  5. Step 5: Solve for x
    x = 30,294,134,037.18/208,812.60
  6. Step 6: Final answer
    x = 145,078.09

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1.5x scale

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.