Home / 206,860.10-285,504.09-121,972.10

Finding the Fourth Proportional to 206,860.10, 285,504.09 and 121,972.10

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Solution

The fourth proportional to 206,860.10, 285,504.09 and 121,972.10 is: 168,343.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,860.10 : 285,504.09 = 121,972.10 : x
  2. Step 2: Convert to fraction form
    206,860.10/285,504.09 = 121,972.10/x
  3. Step 3: Cross multiply
    206,860.10x = 285,504.09 × 121,972.10
  4. Step 4: Simplify right side
    206,860.10x = 34,823,533,415.89
  5. Step 5: Solve for x
    x = 34,823,533,415.89/206,860.10
  6. Step 6: Final answer
    x = 168,343.40

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1.5x scale

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.