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Finding the Fourth Proportional to 327,888,908.80, 491,833,363.20 and 85,551,812.80

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Solution

The fourth proportional to 327,888,908.80, 491,833,363.20 and 85,551,812.80 is: 128,327,719.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,888,908.80 : 491,833,363.20 = 85,551,812.80 : x
  2. Step 2: Convert to fraction form
    327,888,908.80/491,833,363.20 = 85,551,812.80/x
  3. Step 3: Cross multiply
    327,888,908.80x = 491,833,363.20 × 85,551,812.80
  4. Step 4: Simplify right side
    327,888,908.80x = 42,077,235,817,280,808
  5. Step 5: Solve for x
    x = 42,077,235,817,280,808/327,888,908.80
  6. Step 6: Final answer
    x = 128,327,719.20

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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.