Home / 70,440.22-105,633.60-20,503.72

Finding the Fourth Proportional to 70,440.22, 105,633.60 and 20,503.72

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Solution

The fourth proportional to 70,440.22, 105,633.60 and 20,503.72 is: 30,747.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,440.22 : 105,633.60 = 20,503.72 : x
  2. Step 2: Convert to fraction form
    70,440.22/105,633.60 = 20,503.72/x
  3. Step 3: Cross multiply
    70,440.22x = 105,633.60 × 20,503.72
  4. Step 4: Simplify right side
    70,440.22x = 2,165,881,756.99
  5. Step 5: Solve for x
    x = 2,165,881,756.99/70,440.22
  6. Step 6: Final answer
    x = 30,747.80

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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.