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Finding the Fourth Proportional to 82,543.70, 123,815.55 and 53,019.20

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Solution

The fourth proportional to 82,543.70, 123,815.55 and 53,019.20 is: 79,528.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,543.70 : 123,815.55 = 53,019.20 : x
  2. Step 2: Convert to fraction form
    82,543.70/123,815.55 = 53,019.20/x
  3. Step 3: Cross multiply
    82,543.70x = 123,815.55 × 53,019.20
  4. Step 4: Simplify right side
    82,543.70x = 6,564,601,408.56
  5. Step 5: Solve for x
    x = 6,564,601,408.56/82,543.70
  6. Step 6: Final answer
    x = 79,528.80

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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.