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Finding the Fourth Proportional to 115,872.80, 173,809.20 and 113,280.80

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Solution

The fourth proportional to 115,872.80, 173,809.20 and 113,280.80 is: 169,921.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,872.80 : 173,809.20 = 113,280.80 : x
  2. Step 2: Convert to fraction form
    115,872.80/173,809.20 = 113,280.80/x
  3. Step 3: Cross multiply
    115,872.80x = 173,809.20 × 113,280.80
  4. Step 4: Simplify right side
    115,872.80x = 19,689,245,223.36
  5. Step 5: Solve for x
    x = 19,689,245,223.36/115,872.80
  6. Step 6: Final answer
    x = 169,921.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.