Home / 258,737.10-388,109.04-81,244.02

Finding the Fourth Proportional to 258,737.10, 388,109.04 and 81,244.02

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Solution

The fourth proportional to 258,737.10, 388,109.04 and 81,244.02 is: 121,867.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,737.10 : 388,109.04 = 81,244.02 : x
  2. Step 2: Convert to fraction form
    258,737.10/388,109.04 = 81,244.02/x
  3. Step 3: Cross multiply
    258,737.10x = 388,109.04 × 81,244.02
  4. Step 4: Simplify right side
    258,737.10x = 31,531,538,607.94
  5. Step 5: Solve for x
    x = 31,531,538,607.94/258,737.10
  6. Step 6: Final answer
    x = 121,867.09

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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.