Home / 113,991.28-157,327.10-77,180.80

Finding the Fourth Proportional to 113,991.28, 157,327.10 and 77,180.80

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Solution

The fourth proportional to 113,991.28, 157,327.10 and 77,180.80 is: 106,522.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,991.28 : 157,327.10 = 77,180.80 : x
  2. Step 2: Convert to fraction form
    113,991.28/157,327.10 = 77,180.80/x
  3. Step 3: Cross multiply
    113,991.28x = 157,327.10 × 77,180.80
  4. Step 4: Simplify right side
    113,991.28x = 12,142,631,439.68
  5. Step 5: Solve for x
    x = 12,142,631,439.68/113,991.28
  6. Step 6: Final answer
    x = 106,522.46

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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.