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Finding the Fourth Proportional to 115,661.80, 173,838.30 and 100,455.40

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Solution

The fourth proportional to 115,661.80, 173,838.30 and 100,455.40 is: 150,983.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,661.80 : 173,838.30 = 100,455.40 : x
  2. Step 2: Convert to fraction form
    115,661.80/173,838.30 = 100,455.40/x
  3. Step 3: Cross multiply
    115,661.80x = 173,838.30 × 100,455.40
  4. Step 4: Simplify right side
    115,661.80x = 17,462,995,961.82
  5. Step 5: Solve for x
    x = 17,462,995,961.82/115,661.80
  6. Step 6: Final answer
    x = 150,983.26

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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.