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Finding the Fourth Proportional to 93,643.21, 129,218.70 and 53,355.97

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Solution

The fourth proportional to 93,643.21, 129,218.70 and 53,355.97 is: 73,626.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,643.21 : 129,218.70 = 53,355.97 : x
  2. Step 2: Convert to fraction form
    93,643.21/129,218.70 = 53,355.97/x
  3. Step 3: Cross multiply
    93,643.21x = 129,218.70 × 53,355.97
  4. Step 4: Simplify right side
    93,643.21x = 6,894,589,080.64
  5. Step 5: Solve for x
    x = 6,894,589,080.64/93,643.21
  6. Step 6: Final answer
    x = 73,626.15

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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.