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Finding the Fourth Proportional to 72,578,478.70, 108,718,418.85 and 36,696,904.30

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Solution

The fourth proportional to 72,578,478.70, 108,718,418.85 and 36,696,904.30 is: 54,969,868.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,578,478.70 : 108,718,418.85 = 36,696,904.30 : x
  2. Step 2: Convert to fraction form
    72,578,478.70/108,718,418.85 = 36,696,904.30/x
  3. Step 3: Cross multiply
    72,578,478.70x = 108,718,418.85 × 36,696,904.30
  4. Step 4: Simplify right side
    72,578,478.70x = 3,989,629,412,185,765.50
  5. Step 5: Solve for x
    x = 3,989,629,412,185,765.50/72,578,478.70
  6. Step 6: Final answer
    x = 54,969,868.25

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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.