Home / 120,780.72-181,075.80-76,313.76

Finding the Fourth Proportional to 120,780.72, 181,075.80 and 76,313.76

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Solution

The fourth proportional to 120,780.72, 181,075.80 and 76,313.76 is: 114,410.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,780.72 : 181,075.80 = 76,313.76 : x
  2. Step 2: Convert to fraction form
    120,780.72/181,075.80 = 76,313.76/x
  3. Step 3: Cross multiply
    120,780.72x = 181,075.80 × 76,313.76
  4. Step 4: Simplify right side
    120,780.72x = 13,818,575,143.01
  5. Step 5: Solve for x
    x = 13,818,575,143.01/120,780.72
  6. Step 6: Final answer
    x = 114,410.44

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1.5x scale

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.