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Finding the Fourth Proportional to 128,503.84, 192,718.76 and 44,260.60

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Solution

The fourth proportional to 128,503.84, 192,718.76 and 44,260.60 is: 66,378.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,503.84 : 192,718.76 = 44,260.60 : x
  2. Step 2: Convert to fraction form
    128,503.84/192,718.76 = 44,260.60/x
  3. Step 3: Cross multiply
    128,503.84x = 192,718.76 × 44,260.60
  4. Step 4: Simplify right side
    128,503.84x = 8,529,847,948.86
  5. Step 5: Solve for x
    x = 8,529,847,948.86/128,503.84
  6. Step 6: Final answer
    x = 66,378.16

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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.