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Finding the Fourth Proportional to 64,821, 89,460.90 and 36,531.84

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Solution

The fourth proportional to 64,821, 89,460.90 and 36,531.84 is: 50,418.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,821 : 89,460.90 = 36,531.84 : x
  2. Step 2: Convert to fraction form
    64,821/89,460.90 = 36,531.84/x
  3. Step 3: Cross multiply
    64,821x = 89,460.90 × 36,531.84
  4. Step 4: Simplify right side
    64,821x = 3,268,171,285.06
  5. Step 5: Solve for x
    x = 3,268,171,285.06/64,821
  6. Step 6: Final answer
    x = 50,418.40

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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.