Home / 212,971.28-319,363.29-79,758.07

Finding the Fourth Proportional to 212,971.28, 319,363.29 and 79,758.07

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Solution

The fourth proportional to 212,971.28, 319,363.29 and 79,758.07 is: 119,602.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,971.28 : 319,363.29 = 79,758.07 : x
  2. Step 2: Convert to fraction form
    212,971.28/319,363.29 = 79,758.07/x
  3. Step 3: Cross multiply
    212,971.28x = 319,363.29 × 79,758.07
  4. Step 4: Simplify right side
    212,971.28x = 25,471,798,840.84
  5. Step 5: Solve for x
    x = 25,471,798,840.84/212,971.28
  6. Step 6: Final answer
    x = 119,602.04

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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.