Home / 211,938,681.20-292,478,016.24-128,305,701.68

Finding the Fourth Proportional to 211,938,681.20, 292,478,016.24 and 128,305,701.68

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Solution

The fourth proportional to 211,938,681.20, 292,478,016.24 and 128,305,701.68 is: 177,063,464.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,938,681.20 : 292,478,016.24 = 128,305,701.68 : x
  2. Step 2: Convert to fraction form
    211,938,681.20/292,478,016.24 = 128,305,701.68/x
  3. Step 3: Cross multiply
    211,938,681.20x = 292,478,016.24 × 128,305,701.68
  4. Step 4: Simplify right side
    211,938,681.20x = 37,526,597,099,647,640
  5. Step 5: Solve for x
    x = 37,526,597,099,647,640/211,938,681.20
  6. Step 6: Final answer
    x = 177,063,464.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.