Home / 131,870.91-181,921.53-78,125.37

Finding the Fourth Proportional to 131,870.91, 181,921.53 and 78,125.37

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Solution

The fourth proportional to 131,870.91, 181,921.53 and 78,125.37 is: 107,777.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,870.91 : 181,921.53 = 78,125.37 : x
  2. Step 2: Convert to fraction form
    131,870.91/181,921.53 = 78,125.37/x
  3. Step 3: Cross multiply
    131,870.91x = 181,921.53 × 78,125.37
  4. Step 4: Simplify right side
    131,870.91x = 14,212,686,842.22
  5. Step 5: Solve for x
    x = 14,212,686,842.22/131,870.91
  6. Step 6: Final answer
    x = 107,777.27

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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.