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Finding the Fourth Proportional to 113,687.90, 156,900.39 and 84,957.67

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Solution

The fourth proportional to 113,687.90, 156,900.39 and 84,957.67 is: 117,249.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,687.90 : 156,900.39 = 84,957.67 : x
  2. Step 2: Convert to fraction form
    113,687.90/156,900.39 = 84,957.67/x
  3. Step 3: Cross multiply
    113,687.90x = 156,900.39 × 84,957.67
  4. Step 4: Simplify right side
    113,687.90x = 13,329,891,556.49
  5. Step 5: Solve for x
    x = 13,329,891,556.49/113,687.90
  6. Step 6: Final answer
    x = 117,249.87

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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.