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Finding the Fourth Proportional to 52,887.52, 72,986.73 and 31,388.40

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Solution

The fourth proportional to 52,887.52, 72,986.73 and 31,388.40 is: 43,317.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,887.52 : 72,986.73 = 31,388.40 : x
  2. Step 2: Convert to fraction form
    52,887.52/72,986.73 = 31,388.40/x
  3. Step 3: Cross multiply
    52,887.52x = 72,986.73 × 31,388.40
  4. Step 4: Simplify right side
    52,887.52x = 2,290,936,675.93
  5. Step 5: Solve for x
    x = 2,290,936,675.93/52,887.52
  6. Step 6: Final answer
    x = 43,317.15

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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.