Home / 137,705.52-190,010.40-81,128.16

Finding the Fourth Proportional to 137,705.52, 190,010.40 and 81,128.16

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Solution

The fourth proportional to 137,705.52, 190,010.40 and 81,128.16 is: 111,943.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,705.52 : 190,010.40 = 81,128.16 : x
  2. Step 2: Convert to fraction form
    137,705.52/190,010.40 = 81,128.16/x
  3. Step 3: Cross multiply
    137,705.52x = 190,010.40 × 81,128.16
  4. Step 4: Simplify right side
    137,705.52x = 15,415,194,132.86
  5. Step 5: Solve for x
    x = 15,415,194,132.86/137,705.52
  6. Step 6: Final answer
    x = 111,943.18

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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.