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Finding the Fourth Proportional to 70,596.90, 105,871.85 and 28,466.10

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Solution

The fourth proportional to 70,596.90, 105,871.85 and 28,466.10 is: 42,689.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,596.90 : 105,871.85 = 28,466.10 : x
  2. Step 2: Convert to fraction form
    70,596.90/105,871.85 = 28,466.10/x
  3. Step 3: Cross multiply
    70,596.90x = 105,871.85 × 28,466.10
  4. Step 4: Simplify right side
    70,596.90x = 3,013,758,669.29
  5. Step 5: Solve for x
    x = 3,013,758,669.29/70,596.90
  6. Step 6: Final answer
    x = 42,689.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.