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Finding the Fourth Proportional to 128,214.70, 176,835.40 and 119,620.42

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Solution

The fourth proportional to 128,214.70, 176,835.40 and 119,620.42 is: 164,982.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,214.70 : 176,835.40 = 119,620.42 : x
  2. Step 2: Convert to fraction form
    128,214.70/176,835.40 = 119,620.42/x
  3. Step 3: Cross multiply
    128,214.70x = 176,835.40 × 119,620.42
  4. Step 4: Simplify right side
    128,214.70x = 21,153,124,818.87
  5. Step 5: Solve for x
    x = 21,153,124,818.87/128,214.70
  6. Step 6: Final answer
    x = 164,982.06

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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.