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Finding the Fourth Proportional to 51,620.40, 77,315.40 and 42,404.40

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Solution

The fourth proportional to 51,620.40, 77,315.40 and 42,404.40 is: 63,511.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,620.40 : 77,315.40 = 42,404.40 : x
  2. Step 2: Convert to fraction form
    51,620.40/77,315.40 = 42,404.40/x
  3. Step 3: Cross multiply
    51,620.40x = 77,315.40 × 42,404.40
  4. Step 4: Simplify right side
    51,620.40x = 3,278,513,147.76
  5. Step 5: Solve for x
    x = 3,278,513,147.76/51,620.40
  6. Step 6: Final answer
    x = 63,511.97

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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.