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Finding the Fourth Proportional to 93,203.46, 128,509.47 and 76,144.86

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Solution

The fourth proportional to 93,203.46, 128,509.47 and 76,144.86 is: 104,988.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,203.46 : 128,509.47 = 76,144.86 : x
  2. Step 2: Convert to fraction form
    93,203.46/128,509.47 = 76,144.86/x
  3. Step 3: Cross multiply
    93,203.46x = 128,509.47 × 76,144.86
  4. Step 4: Simplify right side
    93,203.46x = 9,785,335,601.82
  5. Step 5: Solve for x
    x = 9,785,335,601.82/93,203.46
  6. Step 6: Final answer
    x = 104,988.97

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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.