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Finding the Fourth Proportional to 128,998.66, 193,499.08 and 35,509.54

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Solution

The fourth proportional to 128,998.66, 193,499.08 and 35,509.54 is: 53,264.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,998.66 : 193,499.08 = 35,509.54 : x
  2. Step 2: Convert to fraction form
    128,998.66/193,499.08 = 35,509.54/x
  3. Step 3: Cross multiply
    128,998.66x = 193,499.08 × 35,509.54
  4. Step 4: Simplify right side
    128,998.66x = 6,871,063,321.22
  5. Step 5: Solve for x
    x = 6,871,063,321.22/128,998.66
  6. Step 6: Final answer
    x = 53,264.61

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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.