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Finding the Fourth Proportional to 163,978.79, 245,709.11 and 123,807.65

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Solution

The fourth proportional to 163,978.79, 245,709.11 and 123,807.65 is: 185,515.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,978.79 : 245,709.11 = 123,807.65 : x
  2. Step 2: Convert to fraction form
    163,978.79/245,709.11 = 123,807.65/x
  3. Step 3: Cross multiply
    163,978.79x = 245,709.11 × 123,807.65
  4. Step 4: Simplify right side
    163,978.79x = 30,420,665,645.11
  5. Step 5: Solve for x
    x = 30,420,665,645.11/163,978.79
  6. Step 6: Final answer
    x = 185,515.86

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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.