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Finding the Fourth Proportional to 78,591.65, 108,249.87 and 60,407.60

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Solution

The fourth proportional to 78,591.65, 108,249.87 and 60,407.60 is: 83,203.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,591.65 : 108,249.87 = 60,407.60 : x
  2. Step 2: Convert to fraction form
    78,591.65/108,249.87 = 60,407.60/x
  3. Step 3: Cross multiply
    78,591.65x = 108,249.87 × 60,407.60
  4. Step 4: Simplify right side
    78,591.65x = 6,539,114,847.01
  5. Step 5: Solve for x
    x = 6,539,114,847.01/78,591.65
  6. Step 6: Final answer
    x = 83,203.68

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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.