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Finding the Fourth Proportional to 93,434.64, 128,786.16 and 66,219.84

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Solution

The fourth proportional to 93,434.64, 128,786.16 and 66,219.84 is: 91,274.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,434.64 : 128,786.16 = 66,219.84 : x
  2. Step 2: Convert to fraction form
    93,434.64/128,786.16 = 66,219.84/x
  3. Step 3: Cross multiply
    93,434.64x = 128,786.16 × 66,219.84
  4. Step 4: Simplify right side
    93,434.64x = 8,528,198,909.41
  5. Step 5: Solve for x
    x = 8,528,198,909.41/93,434.64
  6. Step 6: Final answer
    x = 91,274.49

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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.