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Finding the Fourth Proportional to 78,734,019.20, 118,101,028.80 and 67,774,524.80

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Solution

The fourth proportional to 78,734,019.20, 118,101,028.80 and 67,774,524.80 is: 101,661,787.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,734,019.20 : 118,101,028.80 = 67,774,524.80 : x
  2. Step 2: Convert to fraction form
    78,734,019.20/118,101,028.80 = 67,774,524.80/x
  3. Step 3: Cross multiply
    78,734,019.20x = 118,101,028.80 × 67,774,524.80
  4. Step 4: Simplify right side
    78,734,019.20x = 8,004,241,105,311,114
  5. Step 5: Solve for x
    x = 8,004,241,105,311,114/78,734,019.20
  6. Step 6: Final answer
    x = 101,661,787.20

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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.