Home / 285,720,706.43-428,535,147.22-78,410,689.91

Finding the Fourth Proportional to 285,720,706.43, 428,535,147.22 and 78,410,689.91

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Solution

The fourth proportional to 285,720,706.43, 428,535,147.22 and 78,410,689.91 is: 117,603,435.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,720,706.43 : 428,535,147.22 = 78,410,689.91 : x
  2. Step 2: Convert to fraction form
    285,720,706.43/428,535,147.22 = 78,410,689.91/x
  3. Step 3: Cross multiply
    285,720,706.43x = 428,535,147.22 × 78,410,689.91
  4. Step 4: Simplify right side
    285,720,706.43x = 33,601,736,543,914,160
  5. Step 5: Solve for x
    x = 33,601,736,543,914,160/285,720,706.43
  6. Step 6: Final answer
    x = 117,603,435.06

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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.