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Finding the Fourth Proportional to 73,154.60, 109,666.20 and 28,811.60

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Solution

The fourth proportional to 73,154.60, 109,666.20 and 28,811.60 is: 43,191.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,154.60 : 109,666.20 = 28,811.60 : x
  2. Step 2: Convert to fraction form
    73,154.60/109,666.20 = 28,811.60/x
  3. Step 3: Cross multiply
    73,154.60x = 109,666.20 × 28,811.60
  4. Step 4: Simplify right side
    73,154.60x = 3,159,658,687.92
  5. Step 5: Solve for x
    x = 3,159,658,687.92/73,154.60
  6. Step 6: Final answer
    x = 43,191.52

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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.