Home / 219,288.96-302,586-128,610.72

Finding the Fourth Proportional to 219,288.96, 302,586 and 128,610.72

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Solution

The fourth proportional to 219,288.96, 302,586 and 128,610.72 is: 177,463.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,288.96 : 302,586 = 128,610.72 : x
  2. Step 2: Convert to fraction form
    219,288.96/302,586 = 128,610.72/x
  3. Step 3: Cross multiply
    219,288.96x = 302,586 × 128,610.72
  4. Step 4: Simplify right side
    219,288.96x = 38,915,803,321.92
  5. Step 5: Solve for x
    x = 38,915,803,321.92/219,288.96
  6. Step 6: Final answer
    x = 177,463.58

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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.