Home / 74,123.70-102,289.48-40,131.92

Finding the Fourth Proportional to 74,123.70, 102,289.48 and 40,131.92

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Solution

The fourth proportional to 74,123.70, 102,289.48 and 40,131.92 is: 55,381.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,123.70 : 102,289.48 = 40,131.92 : x
  2. Step 2: Convert to fraction form
    74,123.70/102,289.48 = 40,131.92/x
  3. Step 3: Cross multiply
    74,123.70x = 102,289.48 × 40,131.92
  4. Step 4: Simplify right side
    74,123.70x = 4,105,072,616.42
  5. Step 5: Solve for x
    x = 4,105,072,616.42/74,123.70
  6. Step 6: Final answer
    x = 55,381.38

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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.