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Finding the Fourth Proportional to 74,520.60, 111,780.90 and 19,116.60

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Solution

The fourth proportional to 74,520.60, 111,780.90 and 19,116.60 is: 28,674.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,520.60 : 111,780.90 = 19,116.60 : x
  2. Step 2: Convert to fraction form
    74,520.60/111,780.90 = 19,116.60/x
  3. Step 3: Cross multiply
    74,520.60x = 111,780.90 × 19,116.60
  4. Step 4: Simplify right side
    74,520.60x = 2,136,870,752.94
  5. Step 5: Solve for x
    x = 2,136,870,752.94/74,520.60
  6. Step 6: Final answer
    x = 28,674.90

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1.5x scale

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.