Home / 137,430.20-189,649.86-80,845.40

Finding the Fourth Proportional to 137,430.20, 189,649.86 and 80,845.40

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Solution

The fourth proportional to 137,430.20, 189,649.86 and 80,845.40 is: 111,564.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,430.20 : 189,649.86 = 80,845.40 : x
  2. Step 2: Convert to fraction form
    137,430.20/189,649.86 = 80,845.40/x
  3. Step 3: Cross multiply
    137,430.20x = 189,649.86 × 80,845.40
  4. Step 4: Simplify right side
    137,430.20x = 15,332,318,791.64
  5. Step 5: Solve for x
    x = 15,332,318,791.64/137,430.20
  6. Step 6: Final answer
    x = 111,564.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.