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Finding the Fourth Proportional to 245,579.80, 368,369.70 and 87,813.40

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Solution

The fourth proportional to 245,579.80, 368,369.70 and 87,813.40 is: 131,720.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,579.80 : 368,369.70 = 87,813.40 : x
  2. Step 2: Convert to fraction form
    245,579.80/368,369.70 = 87,813.40/x
  3. Step 3: Cross multiply
    245,579.80x = 368,369.70 × 87,813.40
  4. Step 4: Simplify right side
    245,579.80x = 32,347,795,813.98
  5. Step 5: Solve for x
    x = 32,347,795,813.98/245,579.80
  6. Step 6: Final answer
    x = 131,720.10

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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.