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Finding the Fourth Proportional to 89,072.40, 133,589.40 and 39,152.40

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Solution

The fourth proportional to 89,072.40, 133,589.40 and 39,152.40 is: 58,720.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,072.40 : 133,589.40 = 39,152.40 : x
  2. Step 2: Convert to fraction form
    89,072.40/133,589.40 = 39,152.40/x
  3. Step 3: Cross multiply
    89,072.40x = 133,589.40 × 39,152.40
  4. Step 4: Simplify right side
    89,072.40x = 5,230,345,624.56
  5. Step 5: Solve for x
    x = 5,230,345,624.56/89,072.40
  6. Step 6: Final answer
    x = 58,720.16

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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.