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Finding the Fourth Proportional to 111,355.50, 166,810.70 and 66,957.86

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Solution

The fourth proportional to 111,355.50, 166,810.70 and 66,957.86 is: 100,302.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,355.50 : 166,810.70 = 66,957.86 : x
  2. Step 2: Convert to fraction form
    111,355.50/166,810.70 = 66,957.86/x
  3. Step 3: Cross multiply
    111,355.50x = 166,810.70 × 66,957.86
  4. Step 4: Simplify right side
    111,355.50x = 11,169,287,497.10
  5. Step 5: Solve for x
    x = 11,169,287,497.10/111,355.50
  6. Step 6: Final answer
    x = 100,302.97

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1.5x scale

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.