Home / 64,620.64-89,178.55-39,131.76

Finding the Fourth Proportional to 64,620.64, 89,178.55 and 39,131.76

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Solution

The fourth proportional to 64,620.64, 89,178.55 and 39,131.76 is: 54,003.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,620.64 : 89,178.55 = 39,131.76 : x
  2. Step 2: Convert to fraction form
    64,620.64/89,178.55 = 39,131.76/x
  3. Step 3: Cross multiply
    64,620.64x = 89,178.55 × 39,131.76
  4. Step 4: Simplify right side
    64,620.64x = 3,489,713,615.75
  5. Step 5: Solve for x
    x = 3,489,713,615.75/64,620.64
  6. Step 6: Final answer
    x = 54,003.08

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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.