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Finding the Fourth Proportional to 108,730.94, 150,043.94 and 65,720.85

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Solution

The fourth proportional to 108,730.94, 150,043.94 and 65,720.85 is: 90,691.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,730.94 : 150,043.94 = 65,720.85 : x
  2. Step 2: Convert to fraction form
    108,730.94/150,043.94 = 65,720.85/x
  3. Step 3: Cross multiply
    108,730.94x = 150,043.94 × 65,720.85
  4. Step 4: Simplify right side
    108,730.94x = 9,861,014,945.54
  5. Step 5: Solve for x
    x = 9,861,014,945.54/108,730.94
  6. Step 6: Final answer
    x = 90,691.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.