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Finding the Fourth Proportional to 215,435.64, 323,142.12 and 65,672.32

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Solution

The fourth proportional to 215,435.64, 323,142.12 and 65,672.32 is: 98,505.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,435.64 : 323,142.12 = 65,672.32 : x
  2. Step 2: Convert to fraction form
    215,435.64/323,142.12 = 65,672.32/x
  3. Step 3: Cross multiply
    215,435.64x = 323,142.12 × 65,672.32
  4. Step 4: Simplify right side
    215,435.64x = 21,221,492,710.12
  5. Step 5: Solve for x
    x = 21,221,492,710.12/215,435.64
  6. Step 6: Final answer
    x = 98,505.02

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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.