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Finding the Fourth Proportional to 93,411.36, 128,908.44 and 50,970.60

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Solution

The fourth proportional to 93,411.36, 128,908.44 and 50,970.60 is: 70,339.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,411.36 : 128,908.44 = 50,970.60 : x
  2. Step 2: Convert to fraction form
    93,411.36/128,908.44 = 50,970.60/x
  3. Step 3: Cross multiply
    93,411.36x = 128,908.44 × 50,970.60
  4. Step 4: Simplify right side
    93,411.36x = 6,570,540,531.86
  5. Step 5: Solve for x
    x = 6,570,540,531.86/93,411.36
  6. Step 6: Final answer
    x = 70,339.84

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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.