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Finding the Fourth Proportional to 125,422.05, 187,841.48 and 85,764.45

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Solution

The fourth proportional to 125,422.05, 187,841.48 and 85,764.45 is: 128,447.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,422.05 : 187,841.48 = 85,764.45 : x
  2. Step 2: Convert to fraction form
    125,422.05/187,841.48 = 85,764.45/x
  3. Step 3: Cross multiply
    125,422.05x = 187,841.48 × 85,764.45
  4. Step 4: Simplify right side
    125,422.05x = 16,110,120,790.56
  5. Step 5: Solve for x
    x = 16,110,120,790.56/125,422.05
  6. Step 6: Final answer
    x = 128,447.28

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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.