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Finding the Fourth Proportional to 79,620.12, 109,880.42 and 45,639.14

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Solution

The fourth proportional to 79,620.12, 109,880.42 and 45,639.14 is: 62,984.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,620.12 : 109,880.42 = 45,639.14 : x
  2. Step 2: Convert to fraction form
    79,620.12/109,880.42 = 45,639.14/x
  3. Step 3: Cross multiply
    79,620.12x = 109,880.42 × 45,639.14
  4. Step 4: Simplify right side
    79,620.12x = 5,014,847,094.04
  5. Step 5: Solve for x
    x = 5,014,847,094.04/79,620.12
  6. Step 6: Final answer
    x = 62,984.67

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1.5x scale

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.