Home / 131,881.98-181,986.36-77,428.41

Finding the Fourth Proportional to 131,881.98, 181,986.36 and 77,428.41

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Solution

The fourth proportional to 131,881.98, 181,986.36 and 77,428.41 is: 106,844.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,881.98 : 181,986.36 = 77,428.41 : x
  2. Step 2: Convert to fraction form
    131,881.98/181,986.36 = 77,428.41/x
  3. Step 3: Cross multiply
    131,881.98x = 181,986.36 × 77,428.41
  4. Step 4: Simplify right side
    131,881.98x = 14,090,914,109.35
  5. Step 5: Solve for x
    x = 14,090,914,109.35/131,881.98
  6. Step 6: Final answer
    x = 106,844.88

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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.