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Finding the Fourth Proportional to 154,059.94, 212,613.71 and 85,147.92

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Solution

The fourth proportional to 154,059.94, 212,613.71 and 85,147.92 is: 117,510.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,059.94 : 212,613.71 = 85,147.92 : x
  2. Step 2: Convert to fraction form
    154,059.94/212,613.71 = 85,147.92/x
  3. Step 3: Cross multiply
    154,059.94x = 212,613.71 × 85,147.92
  4. Step 4: Simplify right side
    154,059.94x = 18,103,614,957.75
  5. Step 5: Solve for x
    x = 18,103,614,957.75/154,059.94
  6. Step 6: Final answer
    x = 117,510.21

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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.