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Finding the Fourth Proportional to 139,219.80, 208,829.70 and 83,923.80

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Solution

The fourth proportional to 139,219.80, 208,829.70 and 83,923.80 is: 125,885.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,219.80 : 208,829.70 = 83,923.80 : x
  2. Step 2: Convert to fraction form
    139,219.80/208,829.70 = 83,923.80/x
  3. Step 3: Cross multiply
    139,219.80x = 208,829.70 × 83,923.80
  4. Step 4: Simplify right side
    139,219.80x = 17,525,781,976.86
  5. Step 5: Solve for x
    x = 17,525,781,976.86/139,219.80
  6. Step 6: Final answer
    x = 125,885.70

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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.