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Finding the Fourth Proportional to 64,821.89, 89,454.21 and 36,528.59

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Solution

The fourth proportional to 64,821.89, 89,454.21 and 36,528.59 is: 50,409.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,821.89 : 89,454.21 = 36,528.59 : x
  2. Step 2: Convert to fraction form
    64,821.89/89,454.21 = 36,528.59/x
  3. Step 3: Cross multiply
    64,821.89x = 89,454.21 × 36,528.59
  4. Step 4: Simplify right side
    64,821.89x = 3,267,635,713.59
  5. Step 5: Solve for x
    x = 3,267,635,713.59/64,821.89
  6. Step 6: Final answer
    x = 50,409.45

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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.