Home / 219,299.24-302,635.52-128,656.78

Finding the Fourth Proportional to 219,299.24, 302,635.52 and 128,656.78

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Solution

The fourth proportional to 219,299.24, 302,635.52 and 128,656.78 is: 177,547.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,299.24 : 302,635.52 = 128,656.78 : x
  2. Step 2: Convert to fraction form
    219,299.24/302,635.52 = 128,656.78/x
  3. Step 3: Cross multiply
    219,299.24x = 302,635.52 × 128,656.78
  4. Step 4: Simplify right side
    219,299.24x = 38,936,111,516.83
  5. Step 5: Solve for x
    x = 38,936,111,516.83/219,299.24
  6. Step 6: Final answer
    x = 177,547.86

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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.