Home / 70,486.20-105,542.24-55,135.79

Finding the Fourth Proportional to 70,486.20, 105,542.24 and 55,135.79

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Solution

The fourth proportional to 70,486.20, 105,542.24 and 55,135.79 is: 82,557.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,486.20 : 105,542.24 = 55,135.79 : x
  2. Step 2: Convert to fraction form
    70,486.20/105,542.24 = 55,135.79/x
  3. Step 3: Cross multiply
    70,486.20x = 105,542.24 × 55,135.79
  4. Step 4: Simplify right side
    70,486.20x = 5,819,154,780.77
  5. Step 5: Solve for x
    x = 5,819,154,780.77/70,486.20
  6. Step 6: Final answer
    x = 82,557.36

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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.