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Finding the Fourth Proportional to 427,711.79, 641,567.70 and 112,168.69

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Solution

The fourth proportional to 427,711.79, 641,567.70 and 112,168.69 is: 168,253.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,711.79 : 641,567.70 = 112,168.69 : x
  2. Step 2: Convert to fraction form
    427,711.79/641,567.70 = 112,168.69/x
  3. Step 3: Cross multiply
    427,711.79x = 641,567.70 × 112,168.69
  4. Step 4: Simplify right side
    427,711.79x = 71,963,806,851.39
  5. Step 5: Solve for x
    x = 71,963,806,851.39/427,711.79
  6. Step 6: Final answer
    x = 168,253.03

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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.