Home / 105,195.65-145,171.15-57,450.40

Finding the Fourth Proportional to 105,195.65, 145,171.15 and 57,450.40

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Solution

The fourth proportional to 105,195.65, 145,171.15 and 57,450.40 is: 79,282.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,195.65 : 145,171.15 = 57,450.40 : x
  2. Step 2: Convert to fraction form
    105,195.65/145,171.15 = 57,450.40/x
  3. Step 3: Cross multiply
    105,195.65x = 145,171.15 × 57,450.40
  4. Step 4: Simplify right side
    105,195.65x = 8,340,140,635.96
  5. Step 5: Solve for x
    x = 8,340,140,635.96/105,195.65
  6. Step 6: Final answer
    x = 79,282.18

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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.