Home / 319,488,015.20-479,232,022.80-128,149,109.60

Finding the Fourth Proportional to 319,488,015.20, 479,232,022.80 and 128,149,109.60

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Solution

The fourth proportional to 319,488,015.20, 479,232,022.80 and 128,149,109.60 is: 192,223,664.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,488,015.20 : 479,232,022.80 = 128,149,109.60 : x
  2. Step 2: Convert to fraction form
    319,488,015.20/479,232,022.80 = 128,149,109.60/x
  3. Step 3: Cross multiply
    319,488,015.20x = 479,232,022.80 × 128,149,109.60
  4. Step 4: Simplify right side
    319,488,015.20x = 61,413,157,013,626,896
  5. Step 5: Solve for x
    x = 61,413,157,013,626,896/319,488,015.20
  6. Step 6: Final answer
    x = 192,223,664.40

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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.