Home / 139,829.12-192,968.64-76,168.96

Finding the Fourth Proportional to 139,829.12, 192,968.64 and 76,168.96

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Solution

The fourth proportional to 139,829.12, 192,968.64 and 76,168.96 is: 105,115.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,829.12 : 192,968.64 = 76,168.96 : x
  2. Step 2: Convert to fraction form
    139,829.12/192,968.64 = 76,168.96/x
  3. Step 3: Cross multiply
    139,829.12x = 192,968.64 × 76,168.96
  4. Step 4: Simplify right side
    139,829.12x = 14,698,220,621.41
  5. Step 5: Solve for x
    x = 14,698,220,621.41/139,829.12
  6. Step 6: Final answer
    x = 105,115.59

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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.