Home / 128,215.70-176,836.78-119,621.42

Finding the Fourth Proportional to 128,215.70, 176,836.78 and 119,621.42

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Solution

The fourth proportional to 128,215.70, 176,836.78 and 119,621.42 is: 164,983.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,215.70 : 176,836.78 = 119,621.42 : x
  2. Step 2: Convert to fraction form
    128,215.70/176,836.78 = 119,621.42/x
  3. Step 3: Cross multiply
    128,215.70x = 176,836.78 × 119,621.42
  4. Step 4: Simplify right side
    128,215.70x = 21,153,466,731.83
  5. Step 5: Solve for x
    x = 21,153,466,731.83/128,215.70
  6. Step 6: Final answer
    x = 164,983.44

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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.