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Finding the Fourth Proportional to 163,911.70, 245,875.65 and 85,179.70

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Solution

The fourth proportional to 163,911.70, 245,875.65 and 85,179.70 is: 127,773.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,911.70 : 245,875.65 = 85,179.70 : x
  2. Step 2: Convert to fraction form
    163,911.70/245,875.65 = 85,179.70/x
  3. Step 3: Cross multiply
    163,911.70x = 245,875.65 × 85,179.70
  4. Step 4: Simplify right side
    163,911.70x = 20,943,614,104.31
  5. Step 5: Solve for x
    x = 20,943,614,104.31/163,911.70
  6. Step 6: Final answer
    x = 127,773.76

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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.