Home / 128,933.48-177,928.44-72,344.72

Finding the Fourth Proportional to 128,933.48, 177,928.44 and 72,344.72

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Solution

The fourth proportional to 128,933.48, 177,928.44 and 72,344.72 is: 99,835.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,933.48 : 177,928.44 = 72,344.72 : x
  2. Step 2: Convert to fraction form
    128,933.48/177,928.44 = 72,344.72/x
  3. Step 3: Cross multiply
    128,933.48x = 177,928.44 × 72,344.72
  4. Step 4: Simplify right side
    128,933.48x = 12,872,183,171.84
  5. Step 5: Solve for x
    x = 12,872,183,171.84/128,933.48
  6. Step 6: Final answer
    x = 99,835.85

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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.