Home / 131,736.60-197,345.70-78,989.40

Finding the Fourth Proportional to 131,736.60, 197,345.70 and 78,989.40

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Solution

The fourth proportional to 131,736.60, 197,345.70 and 78,989.40 is: 118,328.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,736.60 : 197,345.70 = 78,989.40 : x
  2. Step 2: Convert to fraction form
    131,736.60/197,345.70 = 78,989.40/x
  3. Step 3: Cross multiply
    131,736.60x = 197,345.70 × 78,989.40
  4. Step 4: Simplify right side
    131,736.60x = 15,588,218,435.58
  5. Step 5: Solve for x
    x = 15,588,218,435.58/131,736.60
  6. Step 6: Final answer
    x = 118,328.68

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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.