Home / 131,285.60-196,669.20-78,538.40

Finding the Fourth Proportional to 131,285.60, 196,669.20 and 78,538.40

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Solution

The fourth proportional to 131,285.60, 196,669.20 and 78,538.40 is: 117,652.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,285.60 : 196,669.20 = 78,538.40 : x
  2. Step 2: Convert to fraction form
    131,285.60/196,669.20 = 78,538.40/x
  3. Step 3: Cross multiply
    131,285.60x = 196,669.20 × 78,538.40
  4. Step 4: Simplify right side
    131,285.60x = 15,446,084,297.28
  5. Step 5: Solve for x
    x = 15,446,084,297.28/131,285.60
  6. Step 6: Final answer
    x = 117,652.54

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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.