Home / 85,824,290.40-128,736,435.60-76,418,440.80

Finding the Fourth Proportional to 85,824,290.40, 128,736,435.60 and 76,418,440.80

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Solution

The fourth proportional to 85,824,290.40, 128,736,435.60 and 76,418,440.80 is: 114,627,661.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,824,290.40 : 128,736,435.60 = 76,418,440.80 : x
  2. Step 2: Convert to fraction form
    85,824,290.40/128,736,435.60 = 76,418,440.80/x
  3. Step 3: Cross multiply
    85,824,290.40x = 128,736,435.60 × 76,418,440.80
  4. Step 4: Simplify right side
    85,824,290.40x = 9,837,837,682,701,612
  5. Step 5: Solve for x
    x = 9,837,837,682,701,612/85,824,290.40
  6. Step 6: Final answer
    x = 114,627,661.20

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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.