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Finding the Fourth Proportional to 52,272, 72,135.36 and 29,920.32

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Solution

The fourth proportional to 52,272, 72,135.36 and 29,920.32 is: 41,290.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,272 : 72,135.36 = 29,920.32 : x
  2. Step 2: Convert to fraction form
    52,272/72,135.36 = 29,920.32/x
  3. Step 3: Cross multiply
    52,272x = 72,135.36 × 29,920.32
  4. Step 4: Simplify right side
    52,272x = 2,158,313,054.52
  5. Step 5: Solve for x
    x = 2,158,313,054.52/52,272
  6. Step 6: Final answer
    x = 41,290.04

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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.