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Finding the Fourth Proportional to 128,213.70, 176,834.03 and 119,619.42

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Solution

The fourth proportional to 128,213.70, 176,834.03 and 119,619.42 is: 164,980.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,213.70 : 176,834.03 = 119,619.42 : x
  2. Step 2: Convert to fraction form
    128,213.70/176,834.03 = 119,619.42/x
  3. Step 3: Cross multiply
    128,213.70x = 176,834.03 × 119,619.42
  4. Step 4: Simplify right side
    128,213.70x = 21,152,783,506.77
  5. Step 5: Solve for x
    x = 21,152,783,506.77/128,213.70
  6. Step 6: Final answer
    x = 164,980.68

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1.5x scale

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.