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Finding the Fourth Proportional to 93,416.57, 128,881.17 and 71,912.89

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Solution

The fourth proportional to 93,416.57, 128,881.17 and 71,912.89 is: 99,213.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,416.57 : 128,881.17 = 71,912.89 : x
  2. Step 2: Convert to fraction form
    93,416.57/128,881.17 = 71,912.89/x
  3. Step 3: Cross multiply
    93,416.57x = 128,881.17 × 71,912.89
  4. Step 4: Simplify right side
    93,416.57x = 9,268,217,401.28
  5. Step 5: Solve for x
    x = 9,268,217,401.28/93,416.57
  6. Step 6: Final answer
    x = 99,213.85

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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.