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Finding the Fourth Proportional to 124,578.40, 186,867.60 and 86,524.60

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Solution

The fourth proportional to 124,578.40, 186,867.60 and 86,524.60 is: 129,786.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,578.40 : 186,867.60 = 86,524.60 : x
  2. Step 2: Convert to fraction form
    124,578.40/186,867.60 = 86,524.60/x
  3. Step 3: Cross multiply
    124,578.40x = 186,867.60 × 86,524.60
  4. Step 4: Simplify right side
    124,578.40x = 16,168,644,342.96
  5. Step 5: Solve for x
    x = 16,168,644,342.96/124,578.40
  6. Step 6: Final answer
    x = 129,786.90

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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.