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Finding the Fourth Proportional to 128,407.42, 192,610.59 and 34,912.90

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Solution

The fourth proportional to 128,407.42, 192,610.59 and 34,912.90 is: 52,369.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,407.42 : 192,610.59 = 34,912.90 : x
  2. Step 2: Convert to fraction form
    128,407.42/192,610.59 = 34,912.90/x
  3. Step 3: Cross multiply
    128,407.42x = 192,610.59 × 34,912.90
  4. Step 4: Simplify right side
    128,407.42x = 6,724,594,267.61
  5. Step 5: Solve for x
    x = 6,724,594,267.61/128,407.42
  6. Step 6: Final answer
    x = 52,369.20

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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.