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Finding the Fourth Proportional to 66,612.72, 91,836 and 64,548.84

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Solution

The fourth proportional to 66,612.72, 91,836 and 64,548.84 is: 88,990.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,612.72 : 91,836 = 64,548.84 : x
  2. Step 2: Convert to fraction form
    66,612.72/91,836 = 64,548.84/x
  3. Step 3: Cross multiply
    66,612.72x = 91,836 × 64,548.84
  4. Step 4: Simplify right side
    66,612.72x = 5,927,907,270.24
  5. Step 5: Solve for x
    x = 5,927,907,270.24/66,612.72
  6. Step 6: Final answer
    x = 88,990.62

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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.