Home / 206,172,003.80-309,258,005.70-91,097,312.60

Finding the Fourth Proportional to 206,172,003.80, 309,258,005.70 and 91,097,312.60

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Solution

The fourth proportional to 206,172,003.80, 309,258,005.70 and 91,097,312.60 is: 136,645,968.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,172,003.80 : 309,258,005.70 = 91,097,312.60 : x
  2. Step 2: Convert to fraction form
    206,172,003.80/309,258,005.70 = 91,097,312.60/x
  3. Step 3: Cross multiply
    206,172,003.80x = 309,258,005.70 × 91,097,312.60
  4. Step 4: Simplify right side
    206,172,003.80x = 28,172,573,219,305,480
  5. Step 5: Solve for x
    x = 28,172,573,219,305,480/206,172,003.80
  6. Step 6: Final answer
    x = 136,645,968.90

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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.