Home / 219,728.96-303,228.32-129,088.72

Finding the Fourth Proportional to 219,728.96, 303,228.32 and 129,088.72

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Solution

The fourth proportional to 219,728.96, 303,228.32 and 129,088.72 is: 178,143.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,728.96 : 303,228.32 = 129,088.72 : x
  2. Step 2: Convert to fraction form
    219,728.96/303,228.32 = 129,088.72/x
  3. Step 3: Cross multiply
    219,728.96x = 303,228.32 × 129,088.72
  4. Step 4: Simplify right side
    219,728.96x = 39,143,355,696.55
  5. Step 5: Solve for x
    x = 39,143,355,696.55/219,728.96
  6. Step 6: Final answer
    x = 178,143.82

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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.