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Finding the Fourth Proportional to 79,656.78, 109,933.44 and 45,677.28

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Solution

The fourth proportional to 79,656.78, 109,933.44 and 45,677.28 is: 63,038.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,656.78 : 109,933.44 = 45,677.28 : x
  2. Step 2: Convert to fraction form
    79,656.78/109,933.44 = 45,677.28/x
  3. Step 3: Cross multiply
    79,656.78x = 109,933.44 × 45,677.28
  4. Step 4: Simplify right side
    79,656.78x = 5,021,460,520.24
  5. Step 5: Solve for x
    x = 5,021,460,520.24/79,656.78
  6. Step 6: Final answer
    x = 63,038.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.