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Finding the Fourth Proportional to 51,248.94, 70,724.79 and 28,587.77

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Solution

The fourth proportional to 51,248.94, 70,724.79 and 28,587.77 is: 39,451.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,248.94 : 70,724.79 = 28,587.77 : x
  2. Step 2: Convert to fraction form
    51,248.94/70,724.79 = 28,587.77/x
  3. Step 3: Cross multiply
    51,248.94x = 70,724.79 × 28,587.77
  4. Step 4: Simplify right side
    51,248.94x = 2,021,863,676.19
  5. Step 5: Solve for x
    x = 2,021,863,676.19/51,248.94
  6. Step 6: Final answer
    x = 39,451.81

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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.