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Finding the Fourth Proportional to 93,361.62, 128,654.88 and 66,428.70

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Solution

The fourth proportional to 93,361.62, 128,654.88 and 66,428.70 is: 91,540.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,361.62 : 128,654.88 = 66,428.70 : x
  2. Step 2: Convert to fraction form
    93,361.62/128,654.88 = 66,428.70/x
  3. Step 3: Cross multiply
    93,361.62x = 128,654.88 × 66,428.70
  4. Step 4: Simplify right side
    93,361.62x = 8,546,376,427.06
  5. Step 5: Solve for x
    x = 8,546,376,427.06/93,361.62
  6. Step 6: Final answer
    x = 91,540.58

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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.