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Finding the Fourth Proportional to 72,677.80, 109,086.30 and 37,642.60

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Solution

The fourth proportional to 72,677.80, 109,086.30 and 37,642.60 is: 56,499.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,677.80 : 109,086.30 = 37,642.60 : x
  2. Step 2: Convert to fraction form
    72,677.80/109,086.30 = 37,642.60/x
  3. Step 3: Cross multiply
    72,677.80x = 109,086.30 × 37,642.60
  4. Step 4: Simplify right side
    72,677.80x = 4,106,291,956.38
  5. Step 5: Solve for x
    x = 4,106,291,956.38/72,677.80
  6. Step 6: Final answer
    x = 56,499.95

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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.