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Finding the Fourth Proportional to 66,612.96, 91,912.32 and 39,746.88

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Solution

The fourth proportional to 66,612.96, 91,912.32 and 39,746.88 is: 54,842.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,612.96 : 91,912.32 = 39,746.88 : x
  2. Step 2: Convert to fraction form
    66,612.96/91,912.32 = 39,746.88/x
  3. Step 3: Cross multiply
    66,612.96x = 91,912.32 × 39,746.88
  4. Step 4: Simplify right side
    66,612.96x = 3,653,227,953.56
  5. Step 5: Solve for x
    x = 3,653,227,953.56/66,612.96
  6. Step 6: Final answer
    x = 54,842.60

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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.