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Finding the Fourth Proportional to 245,569,728.60, 368,405,768.70 and 81,858,344.40

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Solution

The fourth proportional to 245,569,728.60, 368,405,768.70 and 81,858,344.40 is: 122,804,575.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,569,728.60 : 368,405,768.70 = 81,858,344.40 : x
  2. Step 2: Convert to fraction form
    245,569,728.60/368,405,768.70 = 81,858,344.40/x
  3. Step 3: Cross multiply
    245,569,728.60x = 368,405,768.70 × 81,858,344.40
  4. Step 4: Simplify right side
    245,569,728.60x = 30,157,086,293,191,340
  5. Step 5: Solve for x
    x = 30,157,086,293,191,340/245,569,728.60
  6. Step 6: Final answer
    x = 122,804,575.57

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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.