Home / 171,609.11-236,810.89-100,000.79

Finding the Fourth Proportional to 171,609.11, 236,810.89 and 100,000.79

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Solution

The fourth proportional to 171,609.11, 236,810.89 and 100,000.79 is: 137,995.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,609.11 : 236,810.89 = 100,000.79 : x
  2. Step 2: Convert to fraction form
    171,609.11/236,810.89 = 100,000.79/x
  3. Step 3: Cross multiply
    171,609.11x = 236,810.89 × 100,000.79
  4. Step 4: Simplify right side
    171,609.11x = 23,681,276,080.60
  5. Step 5: Solve for x
    x = 23,681,276,080.60/171,609.11
  6. Step 6: Final answer
    x = 137,995.45

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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.