Home / 85,860,287.70-128,790,431.55-51,422,910.90

Finding the Fourth Proportional to 85,860,287.70, 128,790,431.55 and 51,422,910.90

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Solution

The fourth proportional to 85,860,287.70, 128,790,431.55 and 51,422,910.90 is: 77,134,366.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,860,287.70 : 128,790,431.55 = 51,422,910.90 : x
  2. Step 2: Convert to fraction form
    85,860,287.70/128,790,431.55 = 51,422,910.90/x
  3. Step 3: Cross multiply
    85,860,287.70x = 128,790,431.55 × 51,422,910.90
  4. Step 4: Simplify right side
    85,860,287.70x = 6,622,778,886,368,199
  5. Step 5: Solve for x
    x = 6,622,778,886,368,199/85,860,287.70
  6. Step 6: Final answer
    x = 77,134,366.35

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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.