Home / 139,188.13-208,782.09-79,986.04

Finding the Fourth Proportional to 139,188.13, 208,782.09 and 79,986.04

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Solution

The fourth proportional to 139,188.13, 208,782.09 and 79,986.04 is: 119,979.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,188.13 : 208,782.09 = 79,986.04 : x
  2. Step 2: Convert to fraction form
    139,188.13/208,782.09 = 79,986.04/x
  3. Step 3: Cross multiply
    139,188.13x = 208,782.09 × 79,986.04
  4. Step 4: Simplify right side
    139,188.13x = 16,699,652,801.99
  5. Step 5: Solve for x
    x = 16,699,652,801.99/139,188.13
  6. Step 6: Final answer
    x = 119,979.00

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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.