Home / 219,059.15-302,305.50-128,480.45

Finding the Fourth Proportional to 219,059.15, 302,305.50 and 128,480.45

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Solution

The fourth proportional to 219,059.15, 302,305.50 and 128,480.45 is: 177,305.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,059.15 : 302,305.50 = 128,480.45 : x
  2. Step 2: Convert to fraction form
    219,059.15/302,305.50 = 128,480.45/x
  3. Step 3: Cross multiply
    219,059.15x = 302,305.50 × 128,480.45
  4. Step 4: Simplify right side
    219,059.15x = 38,840,345,165.95
  5. Step 5: Solve for x
    x = 38,840,345,165.95/219,059.15
  6. Step 6: Final answer
    x = 177,305.29

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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.