Home / 138,344.06-190,921.89-84,612.20

Finding the Fourth Proportional to 138,344.06, 190,921.89 and 84,612.20

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Solution

The fourth proportional to 138,344.06, 190,921.89 and 84,612.20 is: 116,769.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,344.06 : 190,921.89 = 84,612.20 : x
  2. Step 2: Convert to fraction form
    138,344.06/190,921.89 = 84,612.20/x
  3. Step 3: Cross multiply
    138,344.06x = 190,921.89 × 84,612.20
  4. Step 4: Simplify right side
    138,344.06x = 16,154,320,186.45
  5. Step 5: Solve for x
    x = 16,154,320,186.45/138,344.06
  6. Step 6: Final answer
    x = 116,769.17

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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.