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Finding the Fourth Proportional to 45,600.40, 68,400.60 and 28,013.20

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Solution

The fourth proportional to 45,600.40, 68,400.60 and 28,013.20 is: 42,019.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,600.40 : 68,400.60 = 28,013.20 : x
  2. Step 2: Convert to fraction form
    45,600.40/68,400.60 = 28,013.20/x
  3. Step 3: Cross multiply
    45,600.40x = 68,400.60 × 28,013.20
  4. Step 4: Simplify right side
    45,600.40x = 1,916,119,687.92
  5. Step 5: Solve for x
    x = 1,916,119,687.92/45,600.40
  6. Step 6: Final answer
    x = 42,019.80

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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.