Home / 218,789.40-301,931.82-128,125.56

Finding the Fourth Proportional to 218,789.40, 301,931.82 and 128,125.56

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Solution

The fourth proportional to 218,789.40, 301,931.82 and 128,125.56 is: 176,814.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,789.40 : 301,931.82 = 128,125.56 : x
  2. Step 2: Convert to fraction form
    218,789.40/301,931.82 = 128,125.56/x
  3. Step 3: Cross multiply
    218,789.40x = 301,931.82 × 128,125.56
  4. Step 4: Simplify right side
    218,789.40x = 38,685,183,519.32
  5. Step 5: Solve for x
    x = 38,685,183,519.32/218,789.40
  6. Step 6: Final answer
    x = 176,814.71

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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.