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Finding the Fourth Proportional to 78,682.22, 108,581.48 and 42,872.22

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Solution

The fourth proportional to 78,682.22, 108,581.48 and 42,872.22 is: 59,163.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,682.22 : 108,581.48 = 42,872.22 : x
  2. Step 2: Convert to fraction form
    78,682.22/108,581.48 = 42,872.22/x
  3. Step 3: Cross multiply
    78,682.22x = 108,581.48 × 42,872.22
  4. Step 4: Simplify right side
    78,682.22x = 4,655,128,884.12
  5. Step 5: Solve for x
    x = 4,655,128,884.12/78,682.22
  6. Step 6: Final answer
    x = 59,163.67

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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.