Home / 74,122.91-102,289.67-40,131.42

Finding the Fourth Proportional to 74,122.91, 102,289.67 and 40,131.42

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Solution

The fourth proportional to 74,122.91, 102,289.67 and 40,131.42 is: 55,381.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,122.91 : 102,289.67 = 40,131.42 : x
  2. Step 2: Convert to fraction form
    74,122.91/102,289.67 = 40,131.42/x
  3. Step 3: Cross multiply
    74,122.91x = 102,289.67 × 40,131.42
  4. Step 4: Simplify right side
    74,122.91x = 4,105,029,507.77
  5. Step 5: Solve for x
    x = 4,105,029,507.77/74,122.91
  6. Step 6: Final answer
    x = 55,381.39

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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.