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Finding the Fourth Proportional to 99,900.76, 149,861.18 and 28,825.16

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Solution

The fourth proportional to 99,900.76, 149,861.18 and 28,825.16 is: 43,240.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,900.76 : 149,861.18 = 28,825.16 : x
  2. Step 2: Convert to fraction form
    99,900.76/149,861.18 = 28,825.16/x
  3. Step 3: Cross multiply
    99,900.76x = 149,861.18 × 28,825.16
  4. Step 4: Simplify right side
    99,900.76x = 4,319,772,491.29
  5. Step 5: Solve for x
    x = 4,319,772,491.29/99,900.76
  6. Step 6: Final answer
    x = 43,240.64

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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.