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Finding the Fourth Proportional to 121,168.80, 181,683.60 and 51,097.20

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Solution

The fourth proportional to 121,168.80, 181,683.60 and 51,097.20 is: 76,616.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,168.80 : 181,683.60 = 51,097.20 : x
  2. Step 2: Convert to fraction form
    121,168.80/181,683.60 = 51,097.20/x
  3. Step 3: Cross multiply
    121,168.80x = 181,683.60 × 51,097.20
  4. Step 4: Simplify right side
    121,168.80x = 9,283,523,245.92
  5. Step 5: Solve for x
    x = 9,283,523,245.92/121,168.80
  6. Step 6: Final answer
    x = 76,616.45

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Why These Related Problems?

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