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Finding the Fourth Proportional to 128,289.83, 192,466.02 and 90,412.94

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Solution

The fourth proportional to 128,289.83, 192,466.02 and 90,412.94 is: 135,641.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,289.83 : 192,466.02 = 90,412.94 : x
  2. Step 2: Convert to fraction form
    128,289.83/192,466.02 = 90,412.94/x
  3. Step 3: Cross multiply
    128,289.83x = 192,466.02 × 90,412.94
  4. Step 4: Simplify right side
    128,289.83x = 17,401,419,538.51
  5. Step 5: Solve for x
    x = 17,401,419,538.51/128,289.83
  6. Step 6: Final answer
    x = 135,641.46

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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.