Home / 285,816,993.12-428,552,877.96-128,221,149.96

Finding the Fourth Proportional to 285,816,993.12, 428,552,877.96 and 128,221,149.96

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Solution

The fourth proportional to 285,816,993.12, 428,552,877.96 and 128,221,149.96 is: 192,254,289.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,816,993.12 : 428,552,877.96 = 128,221,149.96 : x
  2. Step 2: Convert to fraction form
    285,816,993.12/428,552,877.96 = 128,221,149.96/x
  3. Step 3: Cross multiply
    285,816,993.12x = 428,552,877.96 × 128,221,149.96
  4. Step 4: Simplify right side
    285,816,993.12x = 54,949,542,830,698,736
  5. Step 5: Solve for x
    x = 54,949,542,830,698,736/285,816,993.12
  6. Step 6: Final answer
    x = 192,254,289.12

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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.