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Finding the Fourth Proportional to 128,404.80, 179,416.80 and 128,404.80

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Solution

The fourth proportional to 128,404.80, 179,416.80 and 128,404.80 is: 179,416.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,404.80 : 179,416.80 = 128,404.80 : x
  2. Step 2: Convert to fraction form
    128,404.80/179,416.80 = 128,404.80/x
  3. Step 3: Cross multiply
    128,404.80x = 179,416.80 × 128,404.80
  4. Step 4: Simplify right side
    128,404.80x = 23,037,978,320.64
  5. Step 5: Solve for x
    x = 23,037,978,320.64/128,404.80
  6. Step 6: Final answer
    x = 179,416.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.