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Finding the Fourth Proportional to 121,014.60, 181,521.90 and 115,571.40

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Solution

The fourth proportional to 121,014.60, 181,521.90 and 115,571.40 is: 173,357.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,014.60 : 181,521.90 = 115,571.40 : x
  2. Step 2: Convert to fraction form
    121,014.60/181,521.90 = 115,571.40/x
  3. Step 3: Cross multiply
    121,014.60x = 181,521.90 × 115,571.40
  4. Step 4: Simplify right side
    121,014.60x = 20,978,740,113.66
  5. Step 5: Solve for x
    x = 20,978,740,113.66/121,014.60
  6. Step 6: Final answer
    x = 173,357.10

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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.