Home / 70,340.32-105,520.91-20,420.83

Finding the Fourth Proportional to 70,340.32, 105,520.91 and 20,420.83

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Solution

The fourth proportional to 70,340.32, 105,520.91 and 20,420.83 is: 30,634.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,340.32 : 105,520.91 = 20,420.83 : x
  2. Step 2: Convert to fraction form
    70,340.32/105,520.91 = 20,420.83/x
  3. Step 3: Cross multiply
    70,340.32x = 105,520.91 × 20,420.83
  4. Step 4: Simplify right side
    70,340.32x = 2,154,824,564.56
  5. Step 5: Solve for x
    x = 2,154,824,564.56/70,340.32
  6. Step 6: Final answer
    x = 30,634.27

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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.