Home / 78,639.46-108,523.69-42,829.44

Finding the Fourth Proportional to 78,639.46, 108,523.69 and 42,829.44

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Solution

The fourth proportional to 78,639.46, 108,523.69 and 42,829.44 is: 59,105.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,639.46 : 108,523.69 = 42,829.44 : x
  2. Step 2: Convert to fraction form
    78,639.46/108,523.69 = 42,829.44/x
  3. Step 3: Cross multiply
    78,639.46x = 108,523.69 × 42,829.44
  4. Step 4: Simplify right side
    78,639.46x = 4,648,008,655.29
  5. Step 5: Solve for x
    x = 4,648,008,655.29/78,639.46
  6. Step 6: Final answer
    x = 59,105.30

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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.