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Finding the Fourth Proportional to 78,490.98, 108,318.33 and 44,499.60

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Solution

The fourth proportional to 78,490.98, 108,318.33 and 44,499.60 is: 61,409.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,490.98 : 108,318.33 = 44,499.60 : x
  2. Step 2: Convert to fraction form
    78,490.98/108,318.33 = 44,499.60/x
  3. Step 3: Cross multiply
    78,490.98x = 108,318.33 × 44,499.60
  4. Step 4: Simplify right side
    78,490.98x = 4,820,122,357.67
  5. Step 5: Solve for x
    x = 4,820,122,357.67/78,490.98
  6. Step 6: Final answer
    x = 61,409.89

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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.