Home / 128,830.40-193,255.20-45,713.60

Finding the Fourth Proportional to 128,830.40, 193,255.20 and 45,713.60

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Solution

The fourth proportional to 128,830.40, 193,255.20 and 45,713.60 is: 68,573.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,830.40 : 193,255.20 = 45,713.60 : x
  2. Step 2: Convert to fraction form
    128,830.40/193,255.20 = 45,713.60/x
  3. Step 3: Cross multiply
    128,830.40x = 193,255.20 × 45,713.60
  4. Step 4: Simplify right side
    128,830.40x = 8,834,390,910.72
  5. Step 5: Solve for x
    x = 8,834,390,910.72/128,830.40
  6. Step 6: Final answer
    x = 68,573.81

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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.