Home / 219,009.57-302,205.73-128,344.78

Finding the Fourth Proportional to 219,009.57, 302,205.73 and 128,344.78

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Solution

The fourth proportional to 219,009.57, 302,205.73 and 128,344.78 is: 177,099.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,009.57 : 302,205.73 = 128,344.78 : x
  2. Step 2: Convert to fraction form
    219,009.57/302,205.73 = 128,344.78/x
  3. Step 3: Cross multiply
    219,009.57x = 302,205.73 × 128,344.78
  4. Step 4: Simplify right side
    219,009.57x = 38,786,527,931.59
  5. Step 5: Solve for x
    x = 38,786,527,931.59/219,009.57
  6. Step 6: Final answer
    x = 177,099.69

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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.