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Finding the Fourth Proportional to 76,221.60, 105,133.32 and 53,608.56

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Solution

The fourth proportional to 76,221.60, 105,133.32 and 53,608.56 is: 73,942.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,221.60 : 105,133.32 = 53,608.56 : x
  2. Step 2: Convert to fraction form
    76,221.60/105,133.32 = 53,608.56/x
  3. Step 3: Cross multiply
    76,221.60x = 105,133.32 × 53,608.56
  4. Step 4: Simplify right side
    76,221.60x = 5,636,045,893.22
  5. Step 5: Solve for x
    x = 5,636,045,893.22/76,221.60
  6. Step 6: Final answer
    x = 73,942.90

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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.