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Finding the Fourth Proportional to 215,549.86, 323,324.72 and 65,790.90

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Solution

The fourth proportional to 215,549.86, 323,324.72 and 65,790.90 is: 98,686.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,549.86 : 323,324.72 = 65,790.90 : x
  2. Step 2: Convert to fraction form
    215,549.86/323,324.72 = 65,790.90/x
  3. Step 3: Cross multiply
    215,549.86x = 323,324.72 × 65,790.90
  4. Step 4: Simplify right side
    215,549.86x = 21,271,824,321.05
  5. Step 5: Solve for x
    x = 21,271,824,321.05/215,549.86
  6. Step 6: Final answer
    x = 98,686.33

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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.