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Finding the Fourth Proportional to 545,178.10, 817,889.11 and 166,128.50

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Solution

The fourth proportional to 545,178.10, 817,889.11 and 166,128.50 is: 249,229.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,178.10 : 817,889.11 = 166,128.50 : x
  2. Step 2: Convert to fraction form
    545,178.10/817,889.11 = 166,128.50/x
  3. Step 3: Cross multiply
    545,178.10x = 817,889.11 × 166,128.50
  4. Step 4: Simplify right side
    545,178.10x = 135,874,691,010.64
  5. Step 5: Solve for x
    x = 135,874,691,010.64/545,178.10
  6. Step 6: Final answer
    x = 249,229.91

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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.