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Finding the Fourth Proportional to 76,779.88, 115,169.80 and 29,999.96

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Solution

The fourth proportional to 76,779.88, 115,169.80 and 29,999.96 is: 44,999.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,779.88 : 115,169.80 = 29,999.96 : x
  2. Step 2: Convert to fraction form
    76,779.88/115,169.80 = 29,999.96/x
  3. Step 3: Cross multiply
    76,779.88x = 115,169.80 × 29,999.96
  4. Step 4: Simplify right side
    76,779.88x = 3,455,089,393.21
  5. Step 5: Solve for x
    x = 3,455,089,393.21/76,779.88
  6. Step 6: Final answer
    x = 44,999.93

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1.5x scale

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.