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Finding the Fourth Proportional to 125,511.30, 187,878.15 and 72,764.10

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Solution

The fourth proportional to 125,511.30, 187,878.15 and 72,764.10 is: 108,920.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,511.30 : 187,878.15 = 72,764.10 : x
  2. Step 2: Convert to fraction form
    125,511.30/187,878.15 = 72,764.10/x
  3. Step 3: Cross multiply
    125,511.30x = 187,878.15 × 72,764.10
  4. Step 4: Simplify right side
    125,511.30x = 13,670,784,494.42
  5. Step 5: Solve for x
    x = 13,670,784,494.42/125,511.30
  6. Step 6: Final answer
    x = 108,920.75

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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.