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Finding the Fourth Proportional to 125,774.93, 188,662.40 and 86,212.10

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Solution

The fourth proportional to 125,774.93, 188,662.40 and 86,212.10 is: 129,318.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,774.93 : 188,662.40 = 86,212.10 : x
  2. Step 2: Convert to fraction form
    125,774.93/188,662.40 = 86,212.10/x
  3. Step 3: Cross multiply
    125,774.93x = 188,662.40 × 86,212.10
  4. Step 4: Simplify right side
    125,774.93x = 16,264,982,058.93
  5. Step 5: Solve for x
    x = 16,264,982,058.93/125,774.93
  6. Step 6: Final answer
    x = 129,318.15

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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.