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Finding the Fourth Proportional to 99,311.88, 148,884 and 43,109.58

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Solution

The fourth proportional to 99,311.88, 148,884 and 43,109.58 is: 64,627.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,311.88 : 148,884 = 43,109.58 : x
  2. Step 2: Convert to fraction form
    99,311.88/148,884 = 43,109.58/x
  3. Step 3: Cross multiply
    99,311.88x = 148,884 × 43,109.58
  4. Step 4: Simplify right side
    99,311.88x = 6,418,326,708.72
  5. Step 5: Solve for x
    x = 6,418,326,708.72/99,311.88
  6. Step 6: Final answer
    x = 64,627.99

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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.