Home / 139,132.20-208,544.70-76,847.40

Finding the Fourth Proportional to 139,132.20, 208,544.70 and 76,847.40

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Solution

The fourth proportional to 139,132.20, 208,544.70 and 76,847.40 is: 115,186.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,132.20 : 208,544.70 = 76,847.40 : x
  2. Step 2: Convert to fraction form
    139,132.20/208,544.70 = 76,847.40/x
  3. Step 3: Cross multiply
    139,132.20x = 208,544.70 × 76,847.40
  4. Step 4: Simplify right side
    139,132.20x = 16,026,117,978.78
  5. Step 5: Solve for x
    x = 16,026,117,978.78/139,132.20
  6. Step 6: Final answer
    x = 115,186.26

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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.