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Finding the Fourth Proportional to 81,073.36, 121,527.36 and 45,938.80

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Solution

The fourth proportional to 81,073.36, 121,527.36 and 45,938.80 is: 68,861.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,073.36 : 121,527.36 = 45,938.80 : x
  2. Step 2: Convert to fraction form
    81,073.36/121,527.36 = 45,938.80/x
  3. Step 3: Cross multiply
    81,073.36x = 121,527.36 × 45,938.80
  4. Step 4: Simplify right side
    81,073.36x = 5,582,821,085.57
  5. Step 5: Solve for x
    x = 5,582,821,085.57/81,073.36
  6. Step 6: Final answer
    x = 68,861.35

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1.5x scale

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.