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Finding the Fourth Proportional to 128,002.60, 192,003.90 and 65,633.32

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Solution

The fourth proportional to 128,002.60, 192,003.90 and 65,633.32 is: 98,449.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,002.60 : 192,003.90 = 65,633.32 : x
  2. Step 2: Convert to fraction form
    128,002.60/192,003.90 = 65,633.32/x
  3. Step 3: Cross multiply
    128,002.60x = 192,003.90 × 65,633.32
  4. Step 4: Simplify right side
    128,002.60x = 12,601,853,409.95
  5. Step 5: Solve for x
    x = 12,601,853,409.95/128,002.60
  6. Step 6: Final answer
    x = 98,449.98

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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.