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Finding the Fourth Proportional to 81,430.38, 122,145.84 and 28,841.40

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Solution

The fourth proportional to 81,430.38, 122,145.84 and 28,841.40 is: 43,262.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,430.38 : 122,145.84 = 28,841.40 : x
  2. Step 2: Convert to fraction form
    81,430.38/122,145.84 = 28,841.40/x
  3. Step 3: Cross multiply
    81,430.38x = 122,145.84 × 28,841.40
  4. Step 4: Simplify right side
    81,430.38x = 3,522,857,029.78
  5. Step 5: Solve for x
    x = 3,522,857,029.78/81,430.38
  6. Step 6: Final answer
    x = 43,262.20

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1.5x scale

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.