Home / 128,731.68-177,586.52-111,712.01

Finding the Fourth Proportional to 128,731.68, 177,586.52 and 111,712.01

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Solution

The fourth proportional to 128,731.68, 177,586.52 and 111,712.01 is: 154,107.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,731.68 : 177,586.52 = 111,712.01 : x
  2. Step 2: Convert to fraction form
    128,731.68/177,586.52 = 111,712.01/x
  3. Step 3: Cross multiply
    128,731.68x = 177,586.52 × 111,712.01
  4. Step 4: Simplify right side
    128,731.68x = 19,838,545,651.61
  5. Step 5: Solve for x
    x = 19,838,545,651.61/128,731.68
  6. Step 6: Final answer
    x = 154,107.72

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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.