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Finding the Fourth Proportional to 64,997.32, 89,697.94 and 39,860.68

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Solution

The fourth proportional to 64,997.32, 89,697.94 and 39,860.68 is: 55,008.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,997.32 : 89,697.94 = 39,860.68 : x
  2. Step 2: Convert to fraction form
    64,997.32/89,697.94 = 39,860.68/x
  3. Step 3: Cross multiply
    64,997.32x = 89,697.94 × 39,860.68
  4. Step 4: Simplify right side
    64,997.32x = 3,575,420,883.00
  5. Step 5: Solve for x
    x = 3,575,420,883.00/64,997.32
  6. Step 6: Final answer
    x = 55,008.74

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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.