Home / 128,106-176,833.46-77,121.11

Finding the Fourth Proportional to 128,106, 176,833.46 and 77,121.11

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Solution

The fourth proportional to 128,106, 176,833.46 and 77,121.11 is: 106,455.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,106 : 176,833.46 = 77,121.11 : x
  2. Step 2: Convert to fraction form
    128,106/176,833.46 = 77,121.11/x
  3. Step 3: Cross multiply
    128,106x = 176,833.46 × 77,121.11
  4. Step 4: Simplify right side
    128,106x = 13,637,591,450.57
  5. Step 5: Solve for x
    x = 13,637,591,450.57/128,106
  6. Step 6: Final answer
    x = 106,455.52

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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.