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Finding the Fourth Proportional to 72,692.64, 108,905.04 and 37,670.40

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Solution

The fourth proportional to 72,692.64, 108,905.04 and 37,670.40 is: 56,436.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,692.64 : 108,905.04 = 37,670.40 : x
  2. Step 2: Convert to fraction form
    72,692.64/108,905.04 = 37,670.40/x
  3. Step 3: Cross multiply
    72,692.64x = 108,905.04 × 37,670.40
  4. Step 4: Simplify right side
    72,692.64x = 4,102,496,418.82
  5. Step 5: Solve for x
    x = 4,102,496,418.82/72,692.64
  6. Step 6: Final answer
    x = 56,436.20

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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.