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Finding the Fourth Proportional to 151,371.20, 227,056.80 and 81,214.40

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Solution

The fourth proportional to 151,371.20, 227,056.80 and 81,214.40 is: 121,821.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,371.20 : 227,056.80 = 81,214.40 : x
  2. Step 2: Convert to fraction form
    151,371.20/227,056.80 = 81,214.40/x
  3. Step 3: Cross multiply
    151,371.20x = 227,056.80 × 81,214.40
  4. Step 4: Simplify right side
    151,371.20x = 18,440,281,777.92
  5. Step 5: Solve for x
    x = 18,440,281,777.92/151,371.20
  6. Step 6: Final answer
    x = 121,821.60

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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.