Home / 131,666.34-197,111.79-81,585.48

Finding the Fourth Proportional to 131,666.34, 197,111.79 and 81,585.48

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Solution

The fourth proportional to 131,666.34, 197,111.79 and 81,585.48 is: 122,137.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,666.34 : 197,111.79 = 81,585.48 : x
  2. Step 2: Convert to fraction form
    131,666.34/197,111.79 = 81,585.48/x
  3. Step 3: Cross multiply
    131,666.34x = 197,111.79 × 81,585.48
  4. Step 4: Simplify right side
    131,666.34x = 16,081,460,000.81
  5. Step 5: Solve for x
    x = 16,081,460,000.81/131,666.34
  6. Step 6: Final answer
    x = 122,137.97

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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.