Home / 89,215.14-133,989.06-78,545.28

Finding the Fourth Proportional to 89,215.14, 133,989.06 and 78,545.28

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Solution

The fourth proportional to 89,215.14, 133,989.06 and 78,545.28 is: 117,964.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,215.14 : 133,989.06 = 78,545.28 : x
  2. Step 2: Convert to fraction form
    89,215.14/133,989.06 = 78,545.28/x
  3. Step 3: Cross multiply
    89,215.14x = 133,989.06 × 78,545.28
  4. Step 4: Simplify right side
    89,215.14x = 10,524,208,234.64
  5. Step 5: Solve for x
    x = 10,524,208,234.64/89,215.14
  6. Step 6: Final answer
    x = 117,964.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.