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Finding the Fourth Proportional to 128,907.90, 193,371.06 and 53,952.60

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Solution

The fourth proportional to 128,907.90, 193,371.06 and 53,952.60 is: 80,932.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,907.90 : 193,371.06 = 53,952.60 : x
  2. Step 2: Convert to fraction form
    128,907.90/193,371.06 = 53,952.60/x
  3. Step 3: Cross multiply
    128,907.90x = 193,371.06 × 53,952.60
  4. Step 4: Simplify right side
    128,907.90x = 10,432,871,451.76
  5. Step 5: Solve for x
    x = 10,432,871,451.76/128,907.90
  6. Step 6: Final answer
    x = 80,932.75

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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.