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Finding the Fourth Proportional to 73,206.60, 109,809.90 and 28,810.50

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Solution

The fourth proportional to 73,206.60, 109,809.90 and 28,810.50 is: 43,215.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,206.60 : 109,809.90 = 28,810.50 : x
  2. Step 2: Convert to fraction form
    73,206.60/109,809.90 = 28,810.50/x
  3. Step 3: Cross multiply
    73,206.60x = 109,809.90 × 28,810.50
  4. Step 4: Simplify right side
    73,206.60x = 3,163,678,123.95
  5. Step 5: Solve for x
    x = 3,163,678,123.95/73,206.60
  6. Step 6: Final answer
    x = 43,215.75

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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.