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Finding the Fourth Proportional to 72,578,442.70, 108,718,364.85 and 36,696,868.30

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Solution

The fourth proportional to 72,578,442.70, 108,718,364.85 and 36,696,868.30 is: 54,969,814.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,578,442.70 : 108,718,364.85 = 36,696,868.30 : x
  2. Step 2: Convert to fraction form
    72,578,442.70/108,718,364.85 = 36,696,868.30/x
  3. Step 3: Cross multiply
    72,578,442.70x = 108,718,364.85 × 36,696,868.30
  4. Step 4: Simplify right side
    72,578,442.70x = 3,989,623,516,691,798.50
  5. Step 5: Solve for x
    x = 3,989,623,516,691,798.50/72,578,442.70
  6. Step 6: Final answer
    x = 54,969,814.29

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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.