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Finding the Fourth Proportional to 72,457.20, 108,685.80 and 60,793.20

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Solution

The fourth proportional to 72,457.20, 108,685.80 and 60,793.20 is: 91,189.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,457.20 : 108,685.80 = 60,793.20 : x
  2. Step 2: Convert to fraction form
    72,457.20/108,685.80 = 60,793.20/x
  3. Step 3: Cross multiply
    72,457.20x = 108,685.80 × 60,793.20
  4. Step 4: Simplify right side
    72,457.20x = 6,607,357,576.56
  5. Step 5: Solve for x
    x = 6,607,357,576.56/72,457.20
  6. Step 6: Final answer
    x = 91,189.80

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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.