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Finding the Fourth Proportional to 75,045.18, 112,511.88 and 45,455.88

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Solution

The fourth proportional to 75,045.18, 112,511.88 and 45,455.88 is: 68,149.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,045.18 : 112,511.88 = 45,455.88 : x
  2. Step 2: Convert to fraction form
    75,045.18/112,511.88 = 45,455.88/x
  3. Step 3: Cross multiply
    75,045.18x = 112,511.88 × 45,455.88
  4. Step 4: Simplify right side
    75,045.18x = 5,114,326,515.85
  5. Step 5: Solve for x
    x = 5,114,326,515.85/75,045.18
  6. Step 6: Final answer
    x = 68,149.97

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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.