Home / 128,923.84-193,385.50-72,738.45

Finding the Fourth Proportional to 128,923.84, 193,385.50 and 72,738.45

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Solution

The fourth proportional to 128,923.84, 193,385.50 and 72,738.45 is: 109,107.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,923.84 : 193,385.50 = 72,738.45 : x
  2. Step 2: Convert to fraction form
    128,923.84/193,385.50 = 72,738.45/x
  3. Step 3: Cross multiply
    128,923.84x = 193,385.50 × 72,738.45
  4. Step 4: Simplify right side
    128,923.84x = 14,066,560,706.36
  5. Step 5: Solve for x
    x = 14,066,560,706.36/128,923.84
  6. Step 6: Final answer
    x = 109,107.52

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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.