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Finding the Fourth Proportional to 93,711.64, 129,400.86 and 66,936.28

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Solution

The fourth proportional to 93,711.64, 129,400.86 and 66,936.28 is: 92,428.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,711.64 : 129,400.86 = 66,936.28 : x
  2. Step 2: Convert to fraction form
    93,711.64/129,400.86 = 66,936.28/x
  3. Step 3: Cross multiply
    93,711.64x = 129,400.86 × 66,936.28
  4. Step 4: Simplify right side
    93,711.64x = 8,661,612,197.20
  5. Step 5: Solve for x
    x = 8,661,612,197.20/93,711.64
  6. Step 6: Final answer
    x = 92,428.35

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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.