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Finding the Fourth Proportional to 93,156.75, 128,643.80 and 64,940.67

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Solution

The fourth proportional to 93,156.75, 128,643.80 and 64,940.67 is: 89,679.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,156.75 : 128,643.80 = 64,940.67 : x
  2. Step 2: Convert to fraction form
    93,156.75/128,643.80 = 64,940.67/x
  3. Step 3: Cross multiply
    93,156.75x = 128,643.80 × 64,940.67
  4. Step 4: Simplify right side
    93,156.75x = 8,354,214,238.64
  5. Step 5: Solve for x
    x = 8,354,214,238.64/93,156.75
  6. Step 6: Final answer
    x = 89,679.11

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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.