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Finding the Fourth Proportional to 121,130.69, 181,715.49 and 51,020.33

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Solution

The fourth proportional to 121,130.69, 181,715.49 and 51,020.33 is: 76,538.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,130.69 : 181,715.49 = 51,020.33 : x
  2. Step 2: Convert to fraction form
    121,130.69/181,715.49 = 51,020.33/x
  3. Step 3: Cross multiply
    121,130.69x = 181,715.49 × 51,020.33
  4. Step 4: Simplify right side
    121,130.69x = 9,271,183,357.33
  5. Step 5: Solve for x
    x = 9,271,183,357.33/121,130.69
  6. Step 6: Final answer
    x = 76,538.69

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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.