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Finding the Fourth Proportional to 92,615.49, 127,811.79 and 56,784.87

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Solution

The fourth proportional to 92,615.49, 127,811.79 and 56,784.87 is: 78,364.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,615.49 : 127,811.79 = 56,784.87 : x
  2. Step 2: Convert to fraction form
    92,615.49/127,811.79 = 56,784.87/x
  3. Step 3: Cross multiply
    92,615.49x = 127,811.79 × 56,784.87
  4. Step 4: Simplify right side
    92,615.49x = 7,257,775,879.62
  5. Step 5: Solve for x
    x = 7,257,775,879.62/92,615.49
  6. Step 6: Final answer
    x = 78,364.60

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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.