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Finding the Third Proportional to 30,784 and 66,276.50

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Solution

The third proportional to 30,784 and 66,276.50 is: 142,690.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,784 : 66,276.50 = 66,276.50 : x
  2. Step 2: Convert to fraction form
    30,784/66,276.50 = 66,276.50/x
  3. Step 3: Cross multiply
    30,784x = 66,276.50 × 66,276.50
  4. Step 4: Simplify right side
    30,784x = 4,392,574,452.25
  5. Step 5: Solve for x
    x = 4,392,574,452.25/30,784
  6. Step 6: Final answer
    x = 142,690.18

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.