Home / 212,931.12-319,396.66-55,159.56

Finding the Fourth Proportional to 212,931.12, 319,396.66 and 55,159.56

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Solution

The fourth proportional to 212,931.12, 319,396.66 and 55,159.56 is: 82,739.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,931.12 : 319,396.66 = 55,159.56 : x
  2. Step 2: Convert to fraction form
    212,931.12/319,396.66 = 55,159.56/x
  3. Step 3: Cross multiply
    212,931.12x = 319,396.66 × 55,159.56
  4. Step 4: Simplify right side
    212,931.12x = 17,617,779,231.07
  5. Step 5: Solve for x
    x = 17,617,779,231.07/212,931.12
  6. Step 6: Final answer
    x = 82,739.33

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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.