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Finding the Fourth Proportional to 128,303.70, 192,564.90 and 57,335.55

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Solution

The fourth proportional to 128,303.70, 192,564.90 and 57,335.55 is: 86,052.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,303.70 : 192,564.90 = 57,335.55 : x
  2. Step 2: Convert to fraction form
    128,303.70/192,564.90 = 57,335.55/x
  3. Step 3: Cross multiply
    128,303.70x = 192,564.90 × 57,335.55
  4. Step 4: Simplify right side
    128,303.70x = 11,040,814,452.20
  5. Step 5: Solve for x
    x = 11,040,814,452.20/128,303.70
  6. Step 6: Final answer
    x = 86,052.19

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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.