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Finding the Fourth Proportional to 124,399.80, 186,642.90 and 54,329.40

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Solution

The fourth proportional to 124,399.80, 186,642.90 and 54,329.40 is: 81,512.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,399.80 : 186,642.90 = 54,329.40 : x
  2. Step 2: Convert to fraction form
    124,399.80/186,642.90 = 54,329.40/x
  3. Step 3: Cross multiply
    124,399.80x = 186,642.90 × 54,329.40
  4. Step 4: Simplify right side
    124,399.80x = 10,140,196,771.26
  5. Step 5: Solve for x
    x = 10,140,196,771.26/124,399.80
  6. Step 6: Final answer
    x = 81,512.97

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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.