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Finding the Fourth Proportional to 93,688.70, 129,287.13 and 53,415.44

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Solution

The fourth proportional to 93,688.70, 129,287.13 and 53,415.44 is: 73,711.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,688.70 : 129,287.13 = 53,415.44 : x
  2. Step 2: Convert to fraction form
    93,688.70/129,287.13 = 53,415.44/x
  3. Step 3: Cross multiply
    93,688.70x = 129,287.13 × 53,415.44
  4. Step 4: Simplify right side
    93,688.70x = 6,905,928,288.85
  5. Step 5: Solve for x
    x = 6,905,928,288.85/93,688.70
  6. Step 6: Final answer
    x = 73,711.44

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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.