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Finding the Fourth Proportional to 78,710.37, 118,034.24 and 28,779.09

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Solution

The fourth proportional to 78,710.37, 118,034.24 and 28,779.09 is: 43,157.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,710.37 : 118,034.24 = 28,779.09 : x
  2. Step 2: Convert to fraction form
    78,710.37/118,034.24 = 28,779.09/x
  3. Step 3: Cross multiply
    78,710.37x = 118,034.24 × 28,779.09
  4. Step 4: Simplify right side
    78,710.37x = 3,396,917,872.15
  5. Step 5: Solve for x
    x = 3,396,917,872.15/78,710.37
  6. Step 6: Final answer
    x = 43,157.18

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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.