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Finding the Fourth Proportional to 94,143.75, 129,929.90 and 54,399.75

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Solution

The fourth proportional to 94,143.75, 129,929.90 and 54,399.75 is: 75,078.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    94,143.75 : 129,929.90 = 54,399.75 : x
  2. Step 2: Convert to fraction form
    94,143.75/129,929.90 = 54,399.75/x
  3. Step 3: Cross multiply
    94,143.75x = 129,929.90 × 54,399.75
  4. Step 4: Simplify right side
    94,143.75x = 7,068,154,077.53
  5. Step 5: Solve for x
    x = 7,068,154,077.53/94,143.75
  6. Step 6: Final answer
    x = 75,078.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.