Home / 212,715.47-319,128.55-79,606.01

Finding the Fourth Proportional to 212,715.47, 319,128.55 and 79,606.01

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Solution

The fourth proportional to 212,715.47, 319,128.55 and 79,606.01 is: 119,429.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,715.47 : 319,128.55 = 79,606.01 : x
  2. Step 2: Convert to fraction form
    212,715.47/319,128.55 = 79,606.01/x
  3. Step 3: Cross multiply
    212,715.47x = 319,128.55 × 79,606.01
  4. Step 4: Simplify right side
    212,715.47x = 25,404,549,943.78
  5. Step 5: Solve for x
    x = 25,404,549,943.78/212,715.47
  6. Step 6: Final answer
    x = 119,429.73

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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.