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Finding the Third Proportional to 5,128,581.75 and 8,120,977.88

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Solution

The third proportional to 5,128,581.75 and 8,120,977.88 is: 12,859,360.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128,581.75 : 8,120,977.88 = 8,120,977.88 : x
  2. Step 2: Convert to fraction form
    5,128,581.75/8,120,977.88 = 8,120,977.88/x
  3. Step 3: Cross multiply
    5,128,581.75x = 8,120,977.88 × 8,120,977.88
  4. Step 4: Simplify right side
    5,128,581.75x = 65,950,281,646,239.52
  5. Step 5: Solve for x
    x = 65,950,281,646,239.52/5,128,581.75
  6. Step 6: Final answer
    x = 12,859,360.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.