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Finding the Fourth Proportional to 51,959.42, 77,939.14 and 12,516.51

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Solution

The fourth proportional to 51,959.42, 77,939.14 and 12,516.51 is: 18,774.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,959.42 : 77,939.14 = 12,516.51 : x
  2. Step 2: Convert to fraction form
    51,959.42/77,939.14 = 12,516.51/x
  3. Step 3: Cross multiply
    51,959.42x = 77,939.14 × 12,516.51
  4. Step 4: Simplify right side
    51,959.42x = 975,526,025.20
  5. Step 5: Solve for x
    x = 975,526,025.20/51,959.42
  6. Step 6: Final answer
    x = 18,774.77

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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.