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Finding the Fourth Proportional to 120,655.36, 166,496.88 and 72,880.48

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Solution

The fourth proportional to 120,655.36, 166,496.88 and 72,880.48 is: 100,570.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,655.36 : 166,496.88 = 72,880.48 : x
  2. Step 2: Convert to fraction form
    120,655.36/166,496.88 = 72,880.48/x
  3. Step 3: Cross multiply
    120,655.36x = 166,496.88 × 72,880.48
  4. Step 4: Simplify right side
    120,655.36x = 12,134,372,532.90
  5. Step 5: Solve for x
    x = 12,134,372,532.90/120,655.36
  6. Step 6: Final answer
    x = 100,570.52

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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.