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Finding the Fourth Proportional to 121,121.60, 169,745.20 and 121,121.60

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Solution

The fourth proportional to 121,121.60, 169,745.20 and 121,121.60 is: 169,745.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,121.60 : 169,745.20 = 121,121.60 : x
  2. Step 2: Convert to fraction form
    121,121.60/169,745.20 = 121,121.60/x
  3. Step 3: Cross multiply
    121,121.60x = 169,745.20 × 121,121.60
  4. Step 4: Simplify right side
    121,121.60x = 20,559,810,216.32
  5. Step 5: Solve for x
    x = 20,559,810,216.32/121,121.60
  6. Step 6: Final answer
    x = 169,745.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.