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Finding the Fourth Proportional to 128,820.10, 192,924.68 and 102,080.10

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Solution

The fourth proportional to 128,820.10, 192,924.68 and 102,080.10 is: 152,878.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,820.10 : 192,924.68 = 102,080.10 : x
  2. Step 2: Convert to fraction form
    128,820.10/192,924.68 = 102,080.10/x
  3. Step 3: Cross multiply
    128,820.10x = 192,924.68 × 102,080.10
  4. Step 4: Simplify right side
    128,820.10x = 19,693,770,626.87
  5. Step 5: Solve for x
    x = 19,693,770,626.87/128,820.10
  6. Step 6: Final answer
    x = 152,878.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.