Home / 78,491,333.86-117,728,017.01-20,988,089.06

Finding the Fourth Proportional to 78,491,333.86, 117,728,017.01 and 20,988,089.06

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Solution

The fourth proportional to 78,491,333.86, 117,728,017.01 and 20,988,089.06 is: 31,479,731.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,491,333.86 : 117,728,017.01 = 20,988,089.06 : x
  2. Step 2: Convert to fraction form
    78,491,333.86/117,728,017.01 = 20,988,089.06/x
  3. Step 3: Cross multiply
    78,491,333.86x = 117,728,017.01 × 20,988,089.06
  4. Step 4: Simplify right side
    78,491,333.86x = 2,470,886,105,910,420
  5. Step 5: Solve for x
    x = 2,470,886,105,910,420/78,491,333.86
  6. Step 6: Final answer
    x = 31,479,731.38

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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.