Home / 128,943.21-193,490.13-54,057.60

Finding the Fourth Proportional to 128,943.21, 193,490.13 and 54,057.60

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Solution

The fourth proportional to 128,943.21, 193,490.13 and 54,057.60 is: 81,117.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,943.21 : 193,490.13 = 54,057.60 : x
  2. Step 2: Convert to fraction form
    128,943.21/193,490.13 = 54,057.60/x
  3. Step 3: Cross multiply
    128,943.21x = 193,490.13 × 54,057.60
  4. Step 4: Simplify right side
    128,943.21x = 10,459,612,051.49
  5. Step 5: Solve for x
    x = 10,459,612,051.49/128,943.21
  6. Step 6: Final answer
    x = 81,117.97

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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.