Home / 135,678.36-187,211.98-81,927.36

Finding the Fourth Proportional to 135,678.36, 187,211.98 and 81,927.36

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Solution

The fourth proportional to 135,678.36, 187,211.98 and 81,927.36 is: 113,045.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,678.36 : 187,211.98 = 81,927.36 : x
  2. Step 2: Convert to fraction form
    135,678.36/187,211.98 = 81,927.36/x
  3. Step 3: Cross multiply
    135,678.36x = 187,211.98 × 81,927.36
  4. Step 4: Simplify right side
    135,678.36x = 15,337,783,281.77
  5. Step 5: Solve for x
    x = 15,337,783,281.77/135,678.36
  6. Step 6: Final answer
    x = 113,045.17

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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.