Home / 128,190.51-192,098.66-90,730.26

Finding the Fourth Proportional to 128,190.51, 192,098.66 and 90,730.26

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Solution

The fourth proportional to 128,190.51, 192,098.66 and 90,730.26 is: 135,962.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,190.51 : 192,098.66 = 90,730.26 : x
  2. Step 2: Convert to fraction form
    128,190.51/192,098.66 = 90,730.26/x
  3. Step 3: Cross multiply
    128,190.51x = 192,098.66 × 90,730.26
  4. Step 4: Simplify right side
    128,190.51x = 17,429,160,913.80
  5. Step 5: Solve for x
    x = 17,429,160,913.80/128,190.51
  6. Step 6: Final answer
    x = 135,962.96

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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.