Home / 113,989.28-157,324.34-77,178.80

Finding the Fourth Proportional to 113,989.28, 157,324.34 and 77,178.80

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Solution

The fourth proportional to 113,989.28, 157,324.34 and 77,178.80 is: 106,519.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,989.28 : 157,324.34 = 77,178.80 : x
  2. Step 2: Convert to fraction form
    113,989.28/157,324.34 = 77,178.80/x
  3. Step 3: Cross multiply
    113,989.28x = 157,324.34 × 77,178.80
  4. Step 4: Simplify right side
    113,989.28x = 12,142,102,599.48
  5. Step 5: Solve for x
    x = 12,142,102,599.48/113,989.28
  6. Step 6: Final answer
    x = 106,519.69

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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.