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Finding the Fourth Proportional to 81,874.42, 112,985.90 and 45,575.29

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Solution

The fourth proportional to 81,874.42, 112,985.90 and 45,575.29 is: 62,893.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,874.42 : 112,985.90 = 45,575.29 : x
  2. Step 2: Convert to fraction form
    81,874.42/112,985.90 = 45,575.29/x
  3. Step 3: Cross multiply
    81,874.42x = 112,985.90 × 45,575.29
  4. Step 4: Simplify right side
    81,874.42x = 5,149,364,818.98
  5. Step 5: Solve for x
    x = 5,149,364,818.98/81,874.42
  6. Step 6: Final answer
    x = 62,893.45

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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.