Home / 78,222,120.92-107,944,420.80-42,939,949.76

Finding the Fourth Proportional to 78,222,120.92, 107,944,420.80 and 42,939,949.76

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Solution

The fourth proportional to 78,222,120.92, 107,944,420.80 and 42,939,949.76 is: 59,255,974.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,222,120.92 : 107,944,420.80 = 42,939,949.76 : x
  2. Step 2: Convert to fraction form
    78,222,120.92/107,944,420.80 = 42,939,949.76/x
  3. Step 3: Cross multiply
    78,222,120.92x = 107,944,420.80 × 42,939,949.76
  4. Step 4: Simplify right side
    78,222,120.92x = 4,635,128,006,024,299
  5. Step 5: Solve for x
    x = 4,635,128,006,024,299/78,222,120.92
  6. Step 6: Final answer
    x = 59,255,974.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.