Home / 129,757.02-179,034.12-78,768.51

Finding the Fourth Proportional to 129,757.02, 179,034.12 and 78,768.51

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Solution

The fourth proportional to 129,757.02, 179,034.12 and 78,768.51 is: 108,681.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,757.02 : 179,034.12 = 78,768.51 : x
  2. Step 2: Convert to fraction form
    129,757.02/179,034.12 = 78,768.51/x
  3. Step 3: Cross multiply
    129,757.02x = 179,034.12 × 78,768.51
  4. Step 4: Simplify right side
    129,757.02x = 14,102,250,871.56
  5. Step 5: Solve for x
    x = 14,102,250,871.56/129,757.02
  6. Step 6: Final answer
    x = 108,681.99

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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.