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Finding the Fourth Proportional to 90,000.40, 135,049.20 and 40,088.20

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Solution

The fourth proportional to 90,000.40, 135,049.20 and 40,088.20 is: 60,153.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,000.40 : 135,049.20 = 40,088.20 : x
  2. Step 2: Convert to fraction form
    90,000.40/135,049.20 = 40,088.20/x
  3. Step 3: Cross multiply
    90,000.40x = 135,049.20 × 40,088.20
  4. Step 4: Simplify right side
    90,000.40x = 5,413,879,339.44
  5. Step 5: Solve for x
    x = 5,413,879,339.44/90,000.40
  6. Step 6: Final answer
    x = 60,153.95

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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.