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Finding the Fourth Proportional to 64,922.56, 89,597.28 and 39,768.64

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Solution

The fourth proportional to 64,922.56, 89,597.28 and 39,768.64 is: 54,883.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,922.56 : 89,597.28 = 39,768.64 : x
  2. Step 2: Convert to fraction form
    64,922.56/89,597.28 = 39,768.64/x
  3. Step 3: Cross multiply
    64,922.56x = 89,597.28 × 39,768.64
  4. Step 4: Simplify right side
    64,922.56x = 3,563,161,973.30
  5. Step 5: Solve for x
    x = 3,563,161,973.30/64,922.56
  6. Step 6: Final answer
    x = 54,883.26

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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.