Home / 208,112.97-312,156.63-128,166.17

Finding the Fourth Proportional to 208,112.97, 312,156.63 and 128,166.17

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Solution

The fourth proportional to 208,112.97, 312,156.63 and 128,166.17 is: 192,241.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,112.97 : 312,156.63 = 128,166.17 : x
  2. Step 2: Convert to fraction form
    208,112.97/312,156.63 = 128,166.17/x
  3. Step 3: Cross multiply
    208,112.97x = 312,156.63 × 128,166.17
  4. Step 4: Simplify right side
    208,112.97x = 40,007,919,707.21
  5. Step 5: Solve for x
    x = 40,007,919,707.21/208,112.97
  6. Step 6: Final answer
    x = 192,241.36

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1.5x scale

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.