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Finding the Fourth Proportional to 78,834.60, 118,251.90 and 49,285.80

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Solution

The fourth proportional to 78,834.60, 118,251.90 and 49,285.80 is: 73,928.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,834.60 : 118,251.90 = 49,285.80 : x
  2. Step 2: Convert to fraction form
    78,834.60/118,251.90 = 49,285.80/x
  3. Step 3: Cross multiply
    78,834.60x = 118,251.90 × 49,285.80
  4. Step 4: Simplify right side
    78,834.60x = 5,828,139,493.02
  5. Step 5: Solve for x
    x = 5,828,139,493.02/78,834.60
  6. Step 6: Final answer
    x = 73,928.70

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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.