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Finding the Fourth Proportional to 108,709.67, 150,020.84 and 65,683.15

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Solution

The fourth proportional to 108,709.67, 150,020.84 and 65,683.15 is: 90,643.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,709.67 : 150,020.84 = 65,683.15 : x
  2. Step 2: Convert to fraction form
    108,709.67/150,020.84 = 65,683.15/x
  3. Step 3: Cross multiply
    108,709.67x = 150,020.84 × 65,683.15
  4. Step 4: Simplify right side
    108,709.67x = 9,853,841,336.85
  5. Step 5: Solve for x
    x = 9,853,841,336.85/108,709.67
  6. Step 6: Final answer
    x = 90,643.65

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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.