Home / 212,851.51-319,061.67-138,019.12

Finding the Fourth Proportional to 212,851.51, 319,061.67 and 138,019.12

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Solution

The fourth proportional to 212,851.51, 319,061.67 and 138,019.12 is: 206,888.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,851.51 : 319,061.67 = 138,019.12 : x
  2. Step 2: Convert to fraction form
    212,851.51/319,061.67 = 138,019.12/x
  3. Step 3: Cross multiply
    212,851.51x = 319,061.67 × 138,019.12
  4. Step 4: Simplify right side
    212,851.51x = 44,036,610,919.13
  5. Step 5: Solve for x
    x = 44,036,610,919.13/212,851.51
  6. Step 6: Final answer
    x = 206,888.88

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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.