Home / 105,578.85-145,698.57-57,180.63

Finding the Fourth Proportional to 105,578.85, 145,698.57 and 57,180.63

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Solution

The fourth proportional to 105,578.85, 145,698.57 and 57,180.63 is: 78,909.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,578.85 : 145,698.57 = 57,180.63 : x
  2. Step 2: Convert to fraction form
    105,578.85/145,698.57 = 57,180.63/x
  3. Step 3: Cross multiply
    105,578.85x = 145,698.57 × 57,180.63
  4. Step 4: Simplify right side
    105,578.85x = 8,331,136,022.70
  5. Step 5: Solve for x
    x = 8,331,136,022.70/105,578.85
  6. Step 6: Final answer
    x = 78,909.14

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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.