Home / 137,029.10-189,103.54-76,609.78

Finding the Fourth Proportional to 137,029.10, 189,103.54 and 76,609.78

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Solution

The fourth proportional to 137,029.10, 189,103.54 and 76,609.78 is: 105,723.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,029.10 : 189,103.54 = 76,609.78 : x
  2. Step 2: Convert to fraction form
    137,029.10/189,103.54 = 76,609.78/x
  3. Step 3: Cross multiply
    137,029.10x = 189,103.54 × 76,609.78
  4. Step 4: Simplify right side
    137,029.10x = 14,487,180,596.62
  5. Step 5: Solve for x
    x = 14,487,180,596.62/137,029.10
  6. Step 6: Final answer
    x = 105,723.39

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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.