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Finding the Fourth Proportional to 90,046.72, 135,065.21 and 45,672.32

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Solution

The fourth proportional to 90,046.72, 135,065.21 and 45,672.32 is: 68,506.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,046.72 : 135,065.21 = 45,672.32 : x
  2. Step 2: Convert to fraction form
    90,046.72/135,065.21 = 45,672.32/x
  3. Step 3: Cross multiply
    90,046.72x = 135,065.21 × 45,672.32
  4. Step 4: Simplify right side
    90,046.72x = 6,168,741,601.29
  5. Step 5: Solve for x
    x = 6,168,741,601.29/90,046.72
  6. Step 6: Final answer
    x = 68,506.01

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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.