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Finding the Fourth Proportional to 144,722.72, 199,724.88 and 81,056.80

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Solution

The fourth proportional to 144,722.72, 199,724.88 and 81,056.80 is: 111,862.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,722.72 : 199,724.88 = 81,056.80 : x
  2. Step 2: Convert to fraction form
    144,722.72/199,724.88 = 81,056.80/x
  3. Step 3: Cross multiply
    144,722.72x = 199,724.88 × 81,056.80
  4. Step 4: Simplify right side
    144,722.72x = 16,189,059,653.18
  5. Step 5: Solve for x
    x = 16,189,059,653.18/144,722.72
  6. Step 6: Final answer
    x = 111,862.60

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1.5x scale

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.