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Finding the Fourth Proportional to 52,572.72, 78,812.15 and 19,284.99

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Solution

The fourth proportional to 52,572.72, 78,812.15 and 19,284.99 is: 28,910.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,572.72 : 78,812.15 = 19,284.99 : x
  2. Step 2: Convert to fraction form
    52,572.72/78,812.15 = 19,284.99/x
  3. Step 3: Cross multiply
    52,572.72x = 78,812.15 × 19,284.99
  4. Step 4: Simplify right side
    52,572.72x = 1,519,891,428.20
  5. Step 5: Solve for x
    x = 1,519,891,428.20/52,572.72
  6. Step 6: Final answer
    x = 28,910.27

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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.