Home / 131,189.12-181,008.78-76,732.82

Finding the Fourth Proportional to 131,189.12, 181,008.78 and 76,732.82

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Solution

The fourth proportional to 131,189.12, 181,008.78 and 76,732.82 is: 105,872.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,189.12 : 181,008.78 = 76,732.82 : x
  2. Step 2: Convert to fraction form
    131,189.12/181,008.78 = 76,732.82/x
  3. Step 3: Cross multiply
    131,189.12x = 181,008.78 × 76,732.82
  4. Step 4: Simplify right side
    131,189.12x = 13,889,314,134.16
  5. Step 5: Solve for x
    x = 13,889,314,134.16/131,189.12
  6. Step 6: Final answer
    x = 105,872.45

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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.