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Finding the Fourth Proportional to 73,619.20, 110,429.76 and 21,030.40

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Solution

The fourth proportional to 73,619.20, 110,429.76 and 21,030.40 is: 31,545.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,619.20 : 110,429.76 = 21,030.40 : x
  2. Step 2: Convert to fraction form
    73,619.20/110,429.76 = 21,030.40/x
  3. Step 3: Cross multiply
    73,619.20x = 110,429.76 × 21,030.40
  4. Step 4: Simplify right side
    73,619.20x = 2,322,382,024.70
  5. Step 5: Solve for x
    x = 2,322,382,024.70/73,619.20
  6. Step 6: Final answer
    x = 31,545.87

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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.