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Finding the Fourth Proportional to 61,990.80, 92,986.20 and 54,214.80

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Solution

The fourth proportional to 61,990.80, 92,986.20 and 54,214.80 is: 81,322.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,990.80 : 92,986.20 = 54,214.80 : x
  2. Step 2: Convert to fraction form
    61,990.80/92,986.20 = 54,214.80/x
  3. Step 3: Cross multiply
    61,990.80x = 92,986.20 × 54,214.80
  4. Step 4: Simplify right side
    61,990.80x = 5,041,228,235.76
  5. Step 5: Solve for x
    x = 5,041,228,235.76/61,990.80
  6. Step 6: Final answer
    x = 81,322.20

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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.