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Finding the Fourth Proportional to 99,980.55, 149,966.18 and 25,099.04

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Solution

The fourth proportional to 99,980.55, 149,966.18 and 25,099.04 is: 37,647.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,980.55 : 149,966.18 = 25,099.04 : x
  2. Step 2: Convert to fraction form
    99,980.55/149,966.18 = 25,099.04/x
  3. Step 3: Cross multiply
    99,980.55x = 149,966.18 × 25,099.04
  4. Step 4: Simplify right side
    99,980.55x = 3,764,006,275.14
  5. Step 5: Solve for x
    x = 3,764,006,275.14/99,980.55
  6. Step 6: Final answer
    x = 37,647.39

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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.