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Finding the Fourth Proportional to 56,679.40, 85,016.40 and 19,235.80

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Solution

The fourth proportional to 56,679.40, 85,016.40 and 19,235.80 is: 28,852.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,679.40 : 85,016.40 = 19,235.80 : x
  2. Step 2: Convert to fraction form
    56,679.40/85,016.40 = 19,235.80/x
  3. Step 3: Cross multiply
    56,679.40x = 85,016.40 × 19,235.80
  4. Step 4: Simplify right side
    56,679.40x = 1,635,358,467.12
  5. Step 5: Solve for x
    x = 1,635,358,467.12/56,679.40
  6. Step 6: Final answer
    x = 28,852.78

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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.