Home / 258,838.04-388,257.34-81,360.56

Finding the Fourth Proportional to 258,838.04, 388,257.34 and 81,360.56

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Solution

The fourth proportional to 258,838.04, 388,257.34 and 81,360.56 is: 122,040.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,838.04 : 388,257.34 = 81,360.56 : x
  2. Step 2: Convert to fraction form
    258,838.04/388,257.34 = 81,360.56/x
  3. Step 3: Cross multiply
    258,838.04x = 388,257.34 × 81,360.56
  4. Step 4: Simplify right side
    258,838.04x = 31,588,834,606.51
  5. Step 5: Solve for x
    x = 31,588,834,606.51/258,838.04
  6. Step 6: Final answer
    x = 122,040.93

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1.5x scale

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.