Home / 128,735.20-193,102.80-76,117.60

Finding the Fourth Proportional to 128,735.20, 193,102.80 and 76,117.60

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Solution

The fourth proportional to 128,735.20, 193,102.80 and 76,117.60 is: 114,176.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,735.20 : 193,102.80 = 76,117.60 : x
  2. Step 2: Convert to fraction form
    128,735.20/193,102.80 = 76,117.60/x
  3. Step 3: Cross multiply
    128,735.20x = 193,102.80 × 76,117.60
  4. Step 4: Simplify right side
    128,735.20x = 14,698,521,689.28
  5. Step 5: Solve for x
    x = 14,698,521,689.28/128,735.20
  6. Step 6: Final answer
    x = 114,176.40

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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.