Home / 208,079,139.80-312,024,231.30-78,643,731.80

Finding the Fourth Proportional to 208,079,139.80, 312,024,231.30 and 78,643,731.80

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Solution

The fourth proportional to 208,079,139.80, 312,024,231.30 and 78,643,731.80 is: 117,929,889.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,079,139.80 : 312,024,231.30 = 78,643,731.80 : x
  2. Step 2: Convert to fraction form
    208,079,139.80/312,024,231.30 = 78,643,731.80/x
  3. Step 3: Cross multiply
    208,079,139.80x = 312,024,231.30 × 78,643,731.80
  4. Step 4: Simplify right side
    208,079,139.80x = 24,538,749,961,458,364
  5. Step 5: Solve for x
    x = 24,538,749,961,458,364/208,079,139.80
  6. Step 6: Final answer
    x = 117,929,889.49

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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.