Home / 78,310,919.70-117,466,379.55-66,721,569.30

Finding the Fourth Proportional to 78,310,919.70, 117,466,379.55 and 66,721,569.30

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Solution

The fourth proportional to 78,310,919.70, 117,466,379.55 and 66,721,569.30 is: 100,082,353.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,310,919.70 : 117,466,379.55 = 66,721,569.30 : x
  2. Step 2: Convert to fraction form
    78,310,919.70/117,466,379.55 = 66,721,569.30/x
  3. Step 3: Cross multiply
    78,310,919.70x = 117,466,379.55 × 66,721,569.30
  4. Step 4: Simplify right side
    78,310,919.70x = 7,837,541,183,565,427
  5. Step 5: Solve for x
    x = 7,837,541,183,565,427/78,310,919.70
  6. Step 6: Final answer
    x = 100,082,353.95

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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.