Home / 135,555.34-187,021.56-81,819.94

Finding the Fourth Proportional to 135,555.34, 187,021.56 and 81,819.94

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Solution

The fourth proportional to 135,555.34, 187,021.56 and 81,819.94 is: 112,884.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,555.34 : 187,021.56 = 81,819.94 : x
  2. Step 2: Convert to fraction form
    135,555.34/187,021.56 = 81,819.94/x
  3. Step 3: Cross multiply
    135,555.34x = 187,021.56 × 81,819.94
  4. Step 4: Simplify right side
    135,555.34x = 15,302,092,817.91
  5. Step 5: Solve for x
    x = 15,302,092,817.91/135,555.34
  6. Step 6: Final answer
    x = 112,884.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.