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Finding the Fourth Proportional to 52,512.80, 78,769.20 and 47,328.80

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Solution

The fourth proportional to 52,512.80, 78,769.20 and 47,328.80 is: 70,993.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,512.80 : 78,769.20 = 47,328.80 : x
  2. Step 2: Convert to fraction form
    52,512.80/78,769.20 = 47,328.80/x
  3. Step 3: Cross multiply
    52,512.80x = 78,769.20 × 47,328.80
  4. Step 4: Simplify right side
    52,512.80x = 3,728,051,712.96
  5. Step 5: Solve for x
    x = 3,728,051,712.96/52,512.80
  6. Step 6: Final answer
    x = 70,993.20

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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.