Home / 385,603.82-578,399.54-105,121.07

Finding the Fourth Proportional to 385,603.82, 578,399.54 and 105,121.07

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Solution

The fourth proportional to 385,603.82, 578,399.54 and 105,121.07 is: 157,679.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,603.82 : 578,399.54 = 105,121.07 : x
  2. Step 2: Convert to fraction form
    385,603.82/578,399.54 = 105,121.07/x
  3. Step 3: Cross multiply
    385,603.82x = 578,399.54 × 105,121.07
  4. Step 4: Simplify right side
    385,603.82x = 60,801,981,128.51
  5. Step 5: Solve for x
    x = 60,801,981,128.51/385,603.82
  6. Step 6: Final answer
    x = 157,679.92

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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.