Home / 138,042.29-190,485.23-80,695.05

Finding the Fourth Proportional to 138,042.29, 190,485.23 and 80,695.05

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Solution

The fourth proportional to 138,042.29, 190,485.23 and 80,695.05 is: 111,351.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,042.29 : 190,485.23 = 80,695.05 : x
  2. Step 2: Convert to fraction form
    138,042.29/190,485.23 = 80,695.05/x
  3. Step 3: Cross multiply
    138,042.29x = 190,485.23 × 80,695.05
  4. Step 4: Simplify right side
    138,042.29x = 15,371,214,755.64
  5. Step 5: Solve for x
    x = 15,371,214,755.64/138,042.29
  6. Step 6: Final answer
    x = 111,351.49

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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.