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Finding the Fourth Proportional to 70,047.60, 104,980.20 and 28,446

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Solution

The fourth proportional to 70,047.60, 104,980.20 and 28,446 is: 42,631.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,047.60 : 104,980.20 = 28,446 : x
  2. Step 2: Convert to fraction form
    70,047.60/104,980.20 = 28,446/x
  3. Step 3: Cross multiply
    70,047.60x = 104,980.20 × 28,446
  4. Step 4: Simplify right side
    70,047.60x = 2,986,266,769.20
  5. Step 5: Solve for x
    x = 2,986,266,769.20/70,047.60
  6. Step 6: Final answer
    x = 42,631.96

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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.