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Finding the Fourth Proportional to 79,070.78, 109,135.19 and 54,575.98

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Solution

The fourth proportional to 79,070.78, 109,135.19 and 54,575.98 is: 75,326.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,070.78 : 109,135.19 = 54,575.98 : x
  2. Step 2: Convert to fraction form
    79,070.78/109,135.19 = 54,575.98/x
  3. Step 3: Cross multiply
    79,070.78x = 109,135.19 × 54,575.98
  4. Step 4: Simplify right side
    79,070.78x = 5,956,159,401.02
  5. Step 5: Solve for x
    x = 5,956,159,401.02/79,070.78
  6. Step 6: Final answer
    x = 75,326.94

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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.