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Finding the Fourth Proportional to 90,320, 135,512.58 and 48,155.72

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Solution

The fourth proportional to 90,320, 135,512.58 and 48,155.72 is: 72,250.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,320 : 135,512.58 = 48,155.72 : x
  2. Step 2: Convert to fraction form
    90,320/135,512.58 = 48,155.72/x
  3. Step 3: Cross multiply
    90,320x = 135,512.58 × 48,155.72
  4. Step 4: Simplify right side
    90,320x = 6,525,705,858.96
  5. Step 5: Solve for x
    x = 6,525,705,858.96/90,320
  6. Step 6: Final answer
    x = 72,250.95

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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.