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Finding the Fourth Proportional to 90,318, 135,509.58 and 48,153.72

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Solution

The fourth proportional to 90,318, 135,509.58 and 48,153.72 is: 72,247.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,318 : 135,509.58 = 48,153.72 : x
  2. Step 2: Convert to fraction form
    90,318/135,509.58 = 48,153.72/x
  3. Step 3: Cross multiply
    90,318x = 135,509.58 × 48,153.72
  4. Step 4: Simplify right side
    90,318x = 6,525,290,372.64
  5. Step 5: Solve for x
    x = 6,525,290,372.64/90,318
  6. Step 6: Final answer
    x = 72,247.95

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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.