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Finding the Fourth Proportional to 219,580.65, 303,023.66 and 128,937.69

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Solution

The fourth proportional to 219,580.65, 303,023.66 and 128,937.69 is: 177,935.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,580.65 : 303,023.66 = 128,937.69 : x
  2. Step 2: Convert to fraction form
    219,580.65/303,023.66 = 128,937.69/x
  3. Step 3: Cross multiply
    219,580.65x = 303,023.66 × 128,937.69
  4. Step 4: Simplify right side
    219,580.65x = 39,071,170,091.06
  5. Step 5: Solve for x
    x = 39,071,170,091.06/219,580.65
  6. Step 6: Final answer
    x = 177,935.40

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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.