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Finding the Fourth Proportional to 58,956.72, 81,257.76 and 51,355.68

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Solution

The fourth proportional to 58,956.72, 81,257.76 and 51,355.68 is: 70,781.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,956.72 : 81,257.76 = 51,355.68 : x
  2. Step 2: Convert to fraction form
    58,956.72/81,257.76 = 51,355.68/x
  3. Step 3: Cross multiply
    58,956.72x = 81,257.76 × 51,355.68
  4. Step 4: Simplify right side
    58,956.72x = 4,173,047,520.08
  5. Step 5: Solve for x
    x = 4,173,047,520.08/58,956.72
  6. Step 6: Final answer
    x = 70,781.54

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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.