Home / 128,943.60-193,415.40-115,384.20

Finding the Fourth Proportional to 128,943.60, 193,415.40 and 115,384.20

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Solution

The fourth proportional to 128,943.60, 193,415.40 and 115,384.20 is: 173,076.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,943.60 : 193,415.40 = 115,384.20 : x
  2. Step 2: Convert to fraction form
    128,943.60/193,415.40 = 115,384.20/x
  3. Step 3: Cross multiply
    128,943.60x = 193,415.40 × 115,384.20
  4. Step 4: Simplify right side
    128,943.60x = 22,317,081,196.68
  5. Step 5: Solve for x
    x = 22,317,081,196.68/128,943.60
  6. Step 6: Final answer
    x = 173,076.30

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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.