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Finding the Fourth Proportional to 93,405.20, 128,899.17 and 59,871.20

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Solution

The fourth proportional to 93,405.20, 128,899.17 and 59,871.20 is: 82,622.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,405.20 : 128,899.17 = 59,871.20 : x
  2. Step 2: Convert to fraction form
    93,405.20/128,899.17 = 59,871.20/x
  3. Step 3: Cross multiply
    93,405.20x = 128,899.17 × 59,871.20
  4. Step 4: Simplify right side
    93,405.20x = 7,717,347,342.41
  5. Step 5: Solve for x
    x = 7,717,347,342.41/93,405.20
  6. Step 6: Final answer
    x = 82,622.25

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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.