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Finding the Fourth Proportional to 128,205.76, 192,303.06 and 39,468.28

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Solution

The fourth proportional to 128,205.76, 192,303.06 and 39,468.28 is: 59,200.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,205.76 : 192,303.06 = 39,468.28 : x
  2. Step 2: Convert to fraction form
    128,205.76/192,303.06 = 39,468.28/x
  3. Step 3: Cross multiply
    128,205.76x = 192,303.06 × 39,468.28
  4. Step 4: Simplify right side
    128,205.76x = 7,589,871,016.94
  5. Step 5: Solve for x
    x = 7,589,871,016.94/128,205.76
  6. Step 6: Final answer
    x = 59,200.70

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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.