Home / 128,321,774.80-192,482,662.20-77,303,438.80

Finding the Fourth Proportional to 128,321,774.80, 192,482,662.20 and 77,303,438.80

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Solution

The fourth proportional to 128,321,774.80, 192,482,662.20 and 77,303,438.80 is: 115,955,158.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,321,774.80 : 192,482,662.20 = 77,303,438.80 : x
  2. Step 2: Convert to fraction form
    128,321,774.80/192,482,662.20 = 77,303,438.80/x
  3. Step 3: Cross multiply
    128,321,774.80x = 192,482,662.20 × 77,303,438.80
  4. Step 4: Simplify right side
    128,321,774.80x = 14,879,571,697,438,772
  5. Step 5: Solve for x
    x = 14,879,571,697,438,772/128,321,774.80
  6. Step 6: Final answer
    x = 115,955,158.20

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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.