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Finding the Fourth Proportional to 128,031.60, 192,047.40 and 122,847.60

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Solution

The fourth proportional to 128,031.60, 192,047.40 and 122,847.60 is: 184,271.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,031.60 : 192,047.40 = 122,847.60 : x
  2. Step 2: Convert to fraction form
    128,031.60/192,047.40 = 122,847.60/x
  3. Step 3: Cross multiply
    128,031.60x = 192,047.40 × 122,847.60
  4. Step 4: Simplify right side
    128,031.60x = 23,592,562,176.24
  5. Step 5: Solve for x
    x = 23,592,562,176.24/128,031.60
  6. Step 6: Final answer
    x = 184,271.40

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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.