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Finding the Fourth Proportional to 81,488.88, 122,183.91 and 31,526.87

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Solution

The fourth proportional to 81,488.88, 122,183.91 and 31,526.87 is: 47,271.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,488.88 : 122,183.91 = 31,526.87 : x
  2. Step 2: Convert to fraction form
    81,488.88/122,183.91 = 31,526.87/x
  3. Step 3: Cross multiply
    81,488.88x = 122,183.91 × 31,526.87
  4. Step 4: Simplify right side
    81,488.88x = 3,852,075,635.74
  5. Step 5: Solve for x
    x = 3,852,075,635.74/81,488.88
  6. Step 6: Final answer
    x = 47,271.18

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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.