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Finding the Fourth Proportional to 76,757.06, 105,917.54 and 56,625.12

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Solution

The fourth proportional to 76,757.06, 105,917.54 and 56,625.12 is: 78,137.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,757.06 : 105,917.54 = 56,625.12 : x
  2. Step 2: Convert to fraction form
    76,757.06/105,917.54 = 56,625.12/x
  3. Step 3: Cross multiply
    76,757.06x = 105,917.54 × 56,625.12
  4. Step 4: Simplify right side
    76,757.06x = 5,997,593,412.60
  5. Step 5: Solve for x
    x = 5,997,593,412.60/76,757.06
  6. Step 6: Final answer
    x = 78,137.35

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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.