Home / 219,216.87-302,520.69-128,554.38

Finding the Fourth Proportional to 219,216.87, 302,520.69 and 128,554.38

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Solution

The fourth proportional to 219,216.87, 302,520.69 and 128,554.38 is: 177,405.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,216.87 : 302,520.69 = 128,554.38 : x
  2. Step 2: Convert to fraction form
    219,216.87/302,520.69 = 128,554.38/x
  3. Step 3: Cross multiply
    219,216.87x = 302,520.69 × 128,554.38
  4. Step 4: Simplify right side
    219,216.87x = 38,890,359,740.12
  5. Step 5: Solve for x
    x = 38,890,359,740.12/219,216.87
  6. Step 6: Final answer
    x = 177,405.87

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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.