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Finding the Fourth Proportional to 116,512.80, 174,898.80 and 72,189.60

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Solution

The fourth proportional to 116,512.80, 174,898.80 and 72,189.60 is: 108,364.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,512.80 : 174,898.80 = 72,189.60 : x
  2. Step 2: Convert to fraction form
    116,512.80/174,898.80 = 72,189.60/x
  3. Step 3: Cross multiply
    116,512.80x = 174,898.80 × 72,189.60
  4. Step 4: Simplify right side
    116,512.80x = 12,625,874,412.48
  5. Step 5: Solve for x
    x = 12,625,874,412.48/116,512.80
  6. Step 6: Final answer
    x = 108,364.70

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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.