Home / 219,455.20-302,890.16-128,831.20

Finding the Fourth Proportional to 219,455.20, 302,890.16 and 128,831.20

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Solution

The fourth proportional to 219,455.20, 302,890.16 and 128,831.20 is: 177,811.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,455.20 : 302,890.16 = 128,831.20 : x
  2. Step 2: Convert to fraction form
    219,455.20/302,890.16 = 128,831.20/x
  3. Step 3: Cross multiply
    219,455.20x = 302,890.16 × 128,831.20
  4. Step 4: Simplify right side
    219,455.20x = 39,021,702,780.99
  5. Step 5: Solve for x
    x = 39,021,702,780.99/219,455.20
  6. Step 6: Final answer
    x = 177,811.70

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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.