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Finding the Fourth Proportional to 52,812.48, 72,879.48 and 28,938.90

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Solution

The fourth proportional to 52,812.48, 72,879.48 and 28,938.90 is: 39,934.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,812.48 : 72,879.48 = 28,938.90 : x
  2. Step 2: Convert to fraction form
    52,812.48/72,879.48 = 28,938.90/x
  3. Step 3: Cross multiply
    52,812.48x = 72,879.48 × 28,938.90
  4. Step 4: Simplify right side
    52,812.48x = 2,109,051,983.77
  5. Step 5: Solve for x
    x = 2,109,051,983.77/52,812.48
  6. Step 6: Final answer
    x = 39,934.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.