Home / 128,464.14-177,280.86-71,107.41

Finding the Fourth Proportional to 128,464.14, 177,280.86 and 71,107.41

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Solution

The fourth proportional to 128,464.14, 177,280.86 and 71,107.41 is: 98,128.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,464.14 : 177,280.86 = 71,107.41 : x
  2. Step 2: Convert to fraction form
    128,464.14/177,280.86 = 71,107.41/x
  3. Step 3: Cross multiply
    128,464.14x = 177,280.86 × 71,107.41
  4. Step 4: Simplify right side
    128,464.14x = 12,605,982,797.17
  5. Step 5: Solve for x
    x = 12,605,982,797.17/128,464.14
  6. Step 6: Final answer
    x = 98,128.42

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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.