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Finding the Fourth Proportional to 125,399.84, 188,128.46 and 54,334.30

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Solution

The fourth proportional to 125,399.84, 188,128.46 and 54,334.30 is: 81,513.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,399.84 : 188,128.46 = 54,334.30 : x
  2. Step 2: Convert to fraction form
    125,399.84/188,128.46 = 54,334.30/x
  3. Step 3: Cross multiply
    125,399.84x = 188,128.46 × 54,334.30
  4. Step 4: Simplify right side
    125,399.84x = 10,221,828,184.18
  5. Step 5: Solve for x
    x = 10,221,828,184.18/125,399.84
  6. Step 6: Final answer
    x = 81,513.89

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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.