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Finding the Fourth Proportional to 71,618.64, 98,832.48 and 39,786.84

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Solution

The fourth proportional to 71,618.64, 98,832.48 and 39,786.84 is: 54,905.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,618.64 : 98,832.48 = 39,786.84 : x
  2. Step 2: Convert to fraction form
    71,618.64/98,832.48 = 39,786.84/x
  3. Step 3: Cross multiply
    71,618.64x = 98,832.48 × 39,786.84
  4. Step 4: Simplify right side
    71,618.64x = 3,932,232,068.56
  5. Step 5: Solve for x
    x = 3,932,232,068.56/71,618.64
  6. Step 6: Final answer
    x = 54,905.15

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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.