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Finding the Fourth Proportional to 56,676.80, 84,959.40 and 31,728.80

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Solution

The fourth proportional to 56,676.80, 84,959.40 and 31,728.80 is: 47,561.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,676.80 : 84,959.40 = 31,728.80 : x
  2. Step 2: Convert to fraction form
    56,676.80/84,959.40 = 31,728.80/x
  3. Step 3: Cross multiply
    56,676.80x = 84,959.40 × 31,728.80
  4. Step 4: Simplify right side
    56,676.80x = 2,695,659,810.72
  5. Step 5: Solve for x
    x = 2,695,659,810.72/56,676.80
  6. Step 6: Final answer
    x = 47,561.96

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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.