Home / 131,412.72-181,357.08-81,112.56

Finding the Fourth Proportional to 131,412.72, 181,357.08 and 81,112.56

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Solution

The fourth proportional to 131,412.72, 181,357.08 and 81,112.56 is: 111,939.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,412.72 : 181,357.08 = 81,112.56 : x
  2. Step 2: Convert to fraction form
    131,412.72/181,357.08 = 81,112.56/x
  3. Step 3: Cross multiply
    131,412.72x = 181,357.08 × 81,112.56
  4. Step 4: Simplify right side
    131,412.72x = 14,710,337,032.92
  5. Step 5: Solve for x
    x = 14,710,337,032.92/131,412.72
  6. Step 6: Final answer
    x = 111,939.98

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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.