Home / 120,780.81-181,075.92-76,313.84

Finding the Fourth Proportional to 120,780.81, 181,075.92 and 76,313.84

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Solution

The fourth proportional to 120,780.81, 181,075.92 and 76,313.84 is: 114,410.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,780.81 : 181,075.92 = 76,313.84 : x
  2. Step 2: Convert to fraction form
    120,780.81/181,075.92 = 76,313.84/x
  3. Step 3: Cross multiply
    120,780.81x = 181,075.92 × 76,313.84
  4. Step 4: Simplify right side
    120,780.81x = 13,818,597,881.35
  5. Step 5: Solve for x
    x = 13,818,597,881.35/120,780.81
  6. Step 6: Final answer
    x = 114,410.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.