Home / 78,491,305.88-117,727,975.17-20,988,061.07

Finding the Fourth Proportional to 78,491,305.88, 117,727,975.17 and 20,988,061.07

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Solution

The fourth proportional to 78,491,305.88, 117,727,975.17 and 20,988,061.07 is: 31,479,689.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,491,305.88 : 117,727,975.17 = 20,988,061.07 : x
  2. Step 2: Convert to fraction form
    78,491,305.88/117,727,975.17 = 20,988,061.07/x
  3. Step 3: Cross multiply
    78,491,305.88x = 117,727,975.17 × 20,988,061.07
  4. Step 4: Simplify right side
    78,491,305.88x = 2,470,881,932,809,724
  5. Step 5: Solve for x
    x = 2,470,881,932,809,724/78,491,305.88
  6. Step 6: Final answer
    x = 31,479,689.44

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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.