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Finding the Fourth Proportional to 52,403.40, 78,609.90 and 21,232.20

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Solution

The fourth proportional to 52,403.40, 78,609.90 and 21,232.20 is: 31,850.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,403.40 : 78,609.90 = 21,232.20 : x
  2. Step 2: Convert to fraction form
    52,403.40/78,609.90 = 21,232.20/x
  3. Step 3: Cross multiply
    52,403.40x = 78,609.90 × 21,232.20
  4. Step 4: Simplify right side
    52,403.40x = 1,669,061,118.78
  5. Step 5: Solve for x
    x = 1,669,061,118.78/52,403.40
  6. Step 6: Final answer
    x = 31,850.24

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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.