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Finding the Fourth Proportional to 73,470.80, 110,206.20 and 72,779.60

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Solution

The fourth proportional to 73,470.80, 110,206.20 and 72,779.60 is: 109,169.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,470.80 : 110,206.20 = 72,779.60 : x
  2. Step 2: Convert to fraction form
    73,470.80/110,206.20 = 72,779.60/x
  3. Step 3: Cross multiply
    73,470.80x = 110,206.20 × 72,779.60
  4. Step 4: Simplify right side
    73,470.80x = 8,020,763,153.52
  5. Step 5: Solve for x
    x = 8,020,763,153.52/73,470.80
  6. Step 6: Final answer
    x = 109,169.40

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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.