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Finding the Fourth Proportional to 61,808.40, 92,712.60 and 55,198.80

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Solution

The fourth proportional to 61,808.40, 92,712.60 and 55,198.80 is: 82,798.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,808.40 : 92,712.60 = 55,198.80 : x
  2. Step 2: Convert to fraction form
    61,808.40/92,712.60 = 55,198.80/x
  3. Step 3: Cross multiply
    61,808.40x = 92,712.60 × 55,198.80
  4. Step 4: Simplify right side
    61,808.40x = 5,117,624,264.88
  5. Step 5: Solve for x
    x = 5,117,624,264.88/61,808.40
  6. Step 6: Final answer
    x = 82,798.20

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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.