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Finding the Fourth Proportional to 132,978.80, 199,301.88 and 66,437.58

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Solution

The fourth proportional to 132,978.80, 199,301.88 and 66,437.58 is: 99,573.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,978.80 : 199,301.88 = 66,437.58 : x
  2. Step 2: Convert to fraction form
    132,978.80/199,301.88 = 66,437.58/x
  3. Step 3: Cross multiply
    132,978.80x = 199,301.88 × 66,437.58
  4. Step 4: Simplify right side
    132,978.80x = 13,241,134,596.65
  5. Step 5: Solve for x
    x = 13,241,134,596.65/132,978.80
  6. Step 6: Final answer
    x = 99,573.27

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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.