Home / 78,720.21-108,628.46-44,270.09

Finding the Fourth Proportional to 78,720.21, 108,628.46 and 44,270.09

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Solution

The fourth proportional to 78,720.21, 108,628.46 and 44,270.09 is: 61,089.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,720.21 : 108,628.46 = 44,270.09 : x
  2. Step 2: Convert to fraction form
    78,720.21/108,628.46 = 44,270.09/x
  3. Step 3: Cross multiply
    78,720.21x = 108,628.46 × 44,270.09
  4. Step 4: Simplify right side
    78,720.21x = 4,808,991,870.35
  5. Step 5: Solve for x
    x = 4,808,991,870.35/78,720.21
  6. Step 6: Final answer
    x = 61,089.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.