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Finding the Fourth Proportional to 70,980.80, 106,471.20 and 53,266.10

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Solution

The fourth proportional to 70,980.80, 106,471.20 and 53,266.10 is: 79,899.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,980.80 : 106,471.20 = 53,266.10 : x
  2. Step 2: Convert to fraction form
    70,980.80/106,471.20 = 53,266.10/x
  3. Step 3: Cross multiply
    70,980.80x = 106,471.20 × 53,266.10
  4. Step 4: Simplify right side
    70,980.80x = 5,671,305,586.32
  5. Step 5: Solve for x
    x = 5,671,305,586.32/70,980.80
  6. Step 6: Final answer
    x = 79,899.15

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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.