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Finding the Fourth Proportional to 123,779.10, 185,668.65 and 115,905.90

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Solution

The fourth proportional to 123,779.10, 185,668.65 and 115,905.90 is: 173,858.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,779.10 : 185,668.65 = 115,905.90 : x
  2. Step 2: Convert to fraction form
    123,779.10/185,668.65 = 115,905.90/x
  3. Step 3: Cross multiply
    123,779.10x = 185,668.65 × 115,905.90
  4. Step 4: Simplify right side
    123,779.10x = 21,520,091,980.04
  5. Step 5: Solve for x
    x = 21,520,091,980.04/123,779.10
  6. Step 6: Final answer
    x = 173,858.85

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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.