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Finding the Fourth Proportional to 56,711.95, 85,130.80 and 47,936.31

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Solution

The fourth proportional to 56,711.95, 85,130.80 and 47,936.31 is: 71,957.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,711.95 : 85,130.80 = 47,936.31 : x
  2. Step 2: Convert to fraction form
    56,711.95/85,130.80 = 47,936.31/x
  3. Step 3: Cross multiply
    56,711.95x = 85,130.80 × 47,936.31
  4. Step 4: Simplify right side
    56,711.95x = 4,080,855,980.27
  5. Step 5: Solve for x
    x = 4,080,855,980.27/56,711.95
  6. Step 6: Final answer
    x = 71,957.61

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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.