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Finding the Fourth Proportional to 58,451.16, 87,621.24 and 18,980.64

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Solution

The fourth proportional to 58,451.16, 87,621.24 and 18,980.64 is: 28,452.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,451.16 : 87,621.24 = 18,980.64 : x
  2. Step 2: Convert to fraction form
    58,451.16/87,621.24 = 18,980.64/x
  3. Step 3: Cross multiply
    58,451.16x = 87,621.24 × 18,980.64
  4. Step 4: Simplify right side
    58,451.16x = 1,663,107,212.79
  5. Step 5: Solve for x
    x = 1,663,107,212.79/58,451.16
  6. Step 6: Final answer
    x = 28,452.94

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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.