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Finding the Fourth Proportional to 245,711.20, 368,566.80 and 79,499.20

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Solution

The fourth proportional to 245,711.20, 368,566.80 and 79,499.20 is: 119,248.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,711.20 : 368,566.80 = 79,499.20 : x
  2. Step 2: Convert to fraction form
    245,711.20/368,566.80 = 79,499.20/x
  3. Step 3: Cross multiply
    245,711.20x = 368,566.80 × 79,499.20
  4. Step 4: Simplify right side
    245,711.20x = 29,300,765,746.56
  5. Step 5: Solve for x
    x = 29,300,765,746.56/245,711.20
  6. Step 6: Final answer
    x = 119,248.80

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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.