Home / 219,713.40-303,159.78-129,084.12

Finding the Fourth Proportional to 219,713.40, 303,159.78 and 129,084.12

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Solution

The fourth proportional to 219,713.40, 303,159.78 and 129,084.12 is: 178,109.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,713.40 : 303,159.78 = 129,084.12 : x
  2. Step 2: Convert to fraction form
    219,713.40/303,159.78 = 129,084.12/x
  3. Step 3: Cross multiply
    219,713.40x = 303,159.78 × 129,084.12
  4. Step 4: Simplify right side
    219,713.40x = 39,133,113,420.69
  5. Step 5: Solve for x
    x = 39,133,113,420.69/219,713.40
  6. Step 6: Final answer
    x = 178,109.82

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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.