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Finding the Fourth Proportional to 93,191.81, 128,621.55 and 54,949.08

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Solution

The fourth proportional to 93,191.81, 128,621.55 and 54,949.08 is: 75,839.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,191.81 : 128,621.55 = 54,949.08 : x
  2. Step 2: Convert to fraction form
    93,191.81/128,621.55 = 54,949.08/x
  3. Step 3: Cross multiply
    93,191.81x = 128,621.55 × 54,949.08
  4. Step 4: Simplify right side
    93,191.81x = 7,067,635,840.67
  5. Step 5: Solve for x
    x = 7,067,635,840.67/93,191.81
  6. Step 6: Final answer
    x = 75,839.67

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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.