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Finding the Fourth Proportional to 81,487.40, 122,303.10 and 48,165.80

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Solution

The fourth proportional to 81,487.40, 122,303.10 and 48,165.80 is: 72,291.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,487.40 : 122,303.10 = 48,165.80 : x
  2. Step 2: Convert to fraction form
    81,487.40/122,303.10 = 48,165.80/x
  3. Step 3: Cross multiply
    81,487.40x = 122,303.10 × 48,165.80
  4. Step 4: Simplify right side
    81,487.40x = 5,890,826,653.98
  5. Step 5: Solve for x
    x = 5,890,826,653.98/81,487.40
  6. Step 6: Final answer
    x = 72,291.26

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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.