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Finding the Fourth Proportional to 76,879.68, 106,089.12 and 42,893.16

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Solution

The fourth proportional to 76,879.68, 106,089.12 and 42,893.16 is: 59,189.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,879.68 : 106,089.12 = 42,893.16 : x
  2. Step 2: Convert to fraction form
    76,879.68/106,089.12 = 42,893.16/x
  3. Step 3: Cross multiply
    76,879.68x = 106,089.12 × 42,893.16
  4. Step 4: Simplify right side
    76,879.68x = 4,550,497,598.42
  5. Step 5: Solve for x
    x = 4,550,497,598.42/76,879.68
  6. Step 6: Final answer
    x = 59,189.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.