Home / 81,430.20-122,145.30-53,436.60

Finding the Fourth Proportional to 81,430.20, 122,145.30 and 53,436.60

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Solution

The fourth proportional to 81,430.20, 122,145.30 and 53,436.60 is: 80,154.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,430.20 : 122,145.30 = 53,436.60 : x
  2. Step 2: Convert to fraction form
    81,430.20/122,145.30 = 53,436.60/x
  3. Step 3: Cross multiply
    81,430.20x = 122,145.30 × 53,436.60
  4. Step 4: Simplify right side
    81,430.20x = 6,527,029,537.98
  5. Step 5: Solve for x
    x = 6,527,029,537.98/81,430.20
  6. Step 6: Final answer
    x = 80,154.90

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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.