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Finding the Fourth Proportional to 52,991.80, 79,487.70 and 52,214.20

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Solution

The fourth proportional to 52,991.80, 79,487.70 and 52,214.20 is: 78,321.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,991.80 : 79,487.70 = 52,214.20 : x
  2. Step 2: Convert to fraction form
    52,991.80/79,487.70 = 52,214.20/x
  3. Step 3: Cross multiply
    52,991.80x = 79,487.70 × 52,214.20
  4. Step 4: Simplify right side
    52,991.80x = 4,150,386,665.34
  5. Step 5: Solve for x
    x = 4,150,386,665.34/52,991.80
  6. Step 6: Final answer
    x = 78,321.30

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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.