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Finding the Fourth Proportional to 123,878.70, 185,890.95 and 45,000.90

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Solution

The fourth proportional to 123,878.70, 185,890.95 and 45,000.90 is: 67,527.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,878.70 : 185,890.95 = 45,000.90 : x
  2. Step 2: Convert to fraction form
    123,878.70/185,890.95 = 45,000.90/x
  3. Step 3: Cross multiply
    123,878.70x = 185,890.95 × 45,000.90
  4. Step 4: Simplify right side
    123,878.70x = 8,365,260,051.86
  5. Step 5: Solve for x
    x = 8,365,260,051.86/123,878.70
  6. Step 6: Final answer
    x = 67,527.83

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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.