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Finding the Fourth Proportional to 145,078.76, 217,584.11 and 70,161.86

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Solution

The fourth proportional to 145,078.76, 217,584.11 and 70,161.86 is: 105,226.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,078.76 : 217,584.11 = 70,161.86 : x
  2. Step 2: Convert to fraction form
    145,078.76/217,584.11 = 70,161.86/x
  3. Step 3: Cross multiply
    145,078.76x = 217,584.11 × 70,161.86
  4. Step 4: Simplify right side
    145,078.76x = 15,266,104,776.12
  5. Step 5: Solve for x
    x = 15,266,104,776.12/145,078.76
  6. Step 6: Final answer
    x = 105,226.33

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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.