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Finding the Fourth Proportional to 67,820.80, 101,828.40 and 51,296.80

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Solution

The fourth proportional to 67,820.80, 101,828.40 and 51,296.80 is: 77,018.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,820.80 : 101,828.40 = 51,296.80 : x
  2. Step 2: Convert to fraction form
    67,820.80/101,828.40 = 51,296.80/x
  3. Step 3: Cross multiply
    67,820.80x = 101,828.40 × 51,296.80
  4. Step 4: Simplify right side
    67,820.80x = 5,223,471,069.12
  5. Step 5: Solve for x
    x = 5,223,471,069.12/67,820.80
  6. Step 6: Final answer
    x = 77,018.72

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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.