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Finding the Fourth Proportional to 163,709.78, 245,540.34 and 45,368.78

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Solution

The fourth proportional to 163,709.78, 245,540.34 and 45,368.78 is: 68,046.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,709.78 : 245,540.34 = 45,368.78 : x
  2. Step 2: Convert to fraction form
    163,709.78/245,540.34 = 45,368.78/x
  3. Step 3: Cross multiply
    163,709.78x = 245,540.34 × 45,368.78
  4. Step 4: Simplify right side
    163,709.78x = 11,139,865,666.59
  5. Step 5: Solve for x
    x = 11,139,865,666.59/163,709.78
  6. Step 6: Final answer
    x = 68,046.43

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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.