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Finding the Fourth Proportional to 77,114.40, 115,441.20 and 45,933.60

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Solution

The fourth proportional to 77,114.40, 115,441.20 and 45,933.60 is: 68,763.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,114.40 : 115,441.20 = 45,933.60 : x
  2. Step 2: Convert to fraction form
    77,114.40/115,441.20 = 45,933.60/x
  3. Step 3: Cross multiply
    77,114.40x = 115,441.20 × 45,933.60
  4. Step 4: Simplify right side
    77,114.40x = 5,302,629,904.32
  5. Step 5: Solve for x
    x = 5,302,629,904.32/77,114.40
  6. Step 6: Final answer
    x = 68,763.16

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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.