Home / 309,971,490-427,760,656.20-170,741,821.20

Finding the Fourth Proportional to 309,971,490, 427,760,656.20 and 170,741,821.20

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Solution

The fourth proportional to 309,971,490, 427,760,656.20 and 170,741,821.20 is: 235,623,713.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,971,490 : 427,760,656.20 = 170,741,821.20 : x
  2. Step 2: Convert to fraction form
    309,971,490/427,760,656.20 = 170,741,821.20/x
  3. Step 3: Cross multiply
    309,971,490x = 427,760,656.20 × 170,741,821.20
  4. Step 4: Simplify right side
    309,971,490x = 73,036,633,477,295,072
  5. Step 5: Solve for x
    x = 73,036,633,477,295,072/309,971,490
  6. Step 6: Final answer
    x = 235,623,713.26

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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.