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Finding the Fourth Proportional to 126,720, 190,080 and 39,168

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Solution

The fourth proportional to 126,720, 190,080 and 39,168 is: 58,752

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,720 : 190,080 = 39,168 : x
  2. Step 2: Convert to fraction form
    126,720/190,080 = 39,168/x
  3. Step 3: Cross multiply
    126,720x = 190,080 × 39,168
  4. Step 4: Simplify right side
    126,720x = 7,445,053,440
  5. Step 5: Solve for x
    x = 7,445,053,440/126,720
  6. Step 6: Final answer
    x = 58,752

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.