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Finding the Fourth Proportional to 99,312.40, 148,968.60 and 92,022.40

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Solution

The fourth proportional to 99,312.40, 148,968.60 and 92,022.40 is: 138,033.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,312.40 : 148,968.60 = 92,022.40 : x
  2. Step 2: Convert to fraction form
    99,312.40/148,968.60 = 92,022.40/x
  3. Step 3: Cross multiply
    99,312.40x = 148,968.60 × 92,022.40
  4. Step 4: Simplify right side
    99,312.40x = 13,708,448,096.64
  5. Step 5: Solve for x
    x = 13,708,448,096.64/99,312.40
  6. Step 6: Final answer
    x = 138,033.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.