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Finding the Fourth Proportional to 99,239.40, 148,526.40 and 81,469.08

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Solution

The fourth proportional to 99,239.40, 148,526.40 and 81,469.08 is: 121,930.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,239.40 : 148,526.40 = 81,469.08 : x
  2. Step 2: Convert to fraction form
    99,239.40/148,526.40 = 81,469.08/x
  3. Step 3: Cross multiply
    99,239.40x = 148,526.40 × 81,469.08
  4. Step 4: Simplify right side
    99,239.40x = 12,100,309,163.71
  5. Step 5: Solve for x
    x = 12,100,309,163.71/99,239.40
  6. Step 6: Final answer
    x = 121,930.49

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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.