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Finding the Fourth Proportional to 70,587.90, 105,880.48 and 28,467.04

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Solution

The fourth proportional to 70,587.90, 105,880.48 and 28,467.04 is: 42,700.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,587.90 : 105,880.48 = 28,467.04 : x
  2. Step 2: Convert to fraction form
    70,587.90/105,880.48 = 28,467.04/x
  3. Step 3: Cross multiply
    70,587.90x = 105,880.48 × 28,467.04
  4. Step 4: Simplify right side
    70,587.90x = 3,014,103,329.98
  5. Step 5: Solve for x
    x = 3,014,103,329.98/70,587.90
  6. Step 6: Final answer
    x = 42,700.00

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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.