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Finding the Fourth Proportional to 51,339.78, 77,007.96 and 19,741.68

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Solution

The fourth proportional to 51,339.78, 77,007.96 and 19,741.68 is: 29,611.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,339.78 : 77,007.96 = 19,741.68 : x
  2. Step 2: Convert to fraction form
    51,339.78/77,007.96 = 19,741.68/x
  3. Step 3: Cross multiply
    51,339.78x = 77,007.96 × 19,741.68
  4. Step 4: Simplify right side
    51,339.78x = 1,520,266,503.77
  5. Step 5: Solve for x
    x = 1,520,266,503.77/51,339.78
  6. Step 6: Final answer
    x = 29,611.86

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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.