Home / 128,601.76-177,517-104,686.92

Finding the Fourth Proportional to 128,601.76, 177,517 and 104,686.92

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Solution

The fourth proportional to 128,601.76, 177,517 and 104,686.92 is: 144,505.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,601.76 : 177,517 = 104,686.92 : x
  2. Step 2: Convert to fraction form
    128,601.76/177,517 = 104,686.92/x
  3. Step 3: Cross multiply
    128,601.76x = 177,517 × 104,686.92
  4. Step 4: Simplify right side
    128,601.76x = 18,583,707,977.64
  5. Step 5: Solve for x
    x = 18,583,707,977.64/128,601.76
  6. Step 6: Final answer
    x = 144,505.86

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1.5x scale

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.