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Finding the Fourth Proportional to 93,890, 129,568.20 and 51,450.14

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Solution

The fourth proportional to 93,890, 129,568.20 and 51,450.14 is: 71,001.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,890 : 129,568.20 = 51,450.14 : x
  2. Step 2: Convert to fraction form
    93,890/129,568.20 = 51,450.14/x
  3. Step 3: Cross multiply
    93,890x = 129,568.20 × 51,450.14
  4. Step 4: Simplify right side
    93,890x = 6,666,302,029.55
  5. Step 5: Solve for x
    x = 6,666,302,029.55/93,890
  6. Step 6: Final answer
    x = 71,001.19

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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.