Home / 131,141.34-196,666.65-81,144.90

Finding the Fourth Proportional to 131,141.34, 196,666.65 and 81,144.90

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Solution

The fourth proportional to 131,141.34, 196,666.65 and 81,144.90 is: 121,689.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,141.34 : 196,666.65 = 81,144.90 : x
  2. Step 2: Convert to fraction form
    131,141.34/196,666.65 = 81,144.90/x
  3. Step 3: Cross multiply
    131,141.34x = 196,666.65 × 81,144.90
  4. Step 4: Simplify right side
    131,141.34x = 15,958,495,647.59
  5. Step 5: Solve for x
    x = 15,958,495,647.59/131,141.34
  6. Step 6: Final answer
    x = 121,689.28

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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.