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Finding the Fourth Proportional to 324,064.80, 486,097.20 and 87,431.40

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Solution

The fourth proportional to 324,064.80, 486,097.20 and 87,431.40 is: 131,147.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,064.80 : 486,097.20 = 87,431.40 : x
  2. Step 2: Convert to fraction form
    324,064.80/486,097.20 = 87,431.40/x
  3. Step 3: Cross multiply
    324,064.80x = 486,097.20 × 87,431.40
  4. Step 4: Simplify right side
    324,064.80x = 42,500,158,732.08
  5. Step 5: Solve for x
    x = 42,500,158,732.08/324,064.80
  6. Step 6: Final answer
    x = 131,147.10

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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.