Home / 85,860,363.20-128,790,544.80-51,422,986.40

Finding the Fourth Proportional to 85,860,363.20, 128,790,544.80 and 51,422,986.40

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Solution

The fourth proportional to 85,860,363.20, 128,790,544.80 and 51,422,986.40 is: 77,134,479.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,860,363.20 : 128,790,544.80 = 51,422,986.40 : x
  2. Step 2: Convert to fraction form
    85,860,363.20/128,790,544.80 = 51,422,986.40/x
  3. Step 3: Cross multiply
    85,860,363.20x = 128,790,544.80 × 51,422,986.40
  4. Step 4: Simplify right side
    85,860,363.20x = 6,622,794,433,698,990
  5. Step 5: Solve for x
    x = 6,622,794,433,698,990/85,860,363.20
  6. Step 6: Final answer
    x = 77,134,479.60

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1.5x scale

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.