Home / 121,939.90-183,823.81-113,811.55

Finding the Fourth Proportional to 121,939.90, 183,823.81 and 113,811.55

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Solution

The fourth proportional to 121,939.90, 183,823.81 and 113,811.55 is: 171,570.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,939.90 : 183,823.81 = 113,811.55 : x
  2. Step 2: Convert to fraction form
    121,939.90/183,823.81 = 113,811.55/x
  3. Step 3: Cross multiply
    121,939.90x = 183,823.81 × 113,811.55
  4. Step 4: Simplify right side
    121,939.90x = 20,921,272,743.01
  5. Step 5: Solve for x
    x = 20,921,272,743.01/121,939.90
  6. Step 6: Final answer
    x = 171,570.36

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.