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Finding the Fourth Proportional to 131,788.80, 197,683.20 and 76,492.80

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Solution

The fourth proportional to 131,788.80, 197,683.20 and 76,492.80 is: 114,739.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,788.80 : 197,683.20 = 76,492.80 : x
  2. Step 2: Convert to fraction form
    131,788.80/197,683.20 = 76,492.80/x
  3. Step 3: Cross multiply
    131,788.80x = 197,683.20 × 76,492.80
  4. Step 4: Simplify right side
    131,788.80x = 15,121,341,480.96
  5. Step 5: Solve for x
    x = 15,121,341,480.96/131,788.80
  6. Step 6: Final answer
    x = 114,739.20

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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.