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Finding the Fourth Proportional to 139,403.88, 209,102.18 and 50,659.07

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Solution

The fourth proportional to 139,403.88, 209,102.18 and 50,659.07 is: 75,987.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,403.88 : 209,102.18 = 50,659.07 : x
  2. Step 2: Convert to fraction form
    139,403.88/209,102.18 = 50,659.07/x
  3. Step 3: Cross multiply
    139,403.88x = 209,102.18 × 50,659.07
  4. Step 4: Simplify right side
    139,403.88x = 10,592,920,674.97
  5. Step 5: Solve for x
    x = 10,592,920,674.97/139,403.88
  6. Step 6: Final answer
    x = 75,987.27

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1.5x scale

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.