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Finding the Fourth Proportional to 52,478.88, 72,418.62 and 28,605

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Solution

The fourth proportional to 52,478.88, 72,418.62 and 28,605 is: 39,473.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,478.88 : 72,418.62 = 28,605 : x
  2. Step 2: Convert to fraction form
    52,478.88/72,418.62 = 28,605/x
  3. Step 3: Cross multiply
    52,478.88x = 72,418.62 × 28,605
  4. Step 4: Simplify right side
    52,478.88x = 2,071,534,625.10
  5. Step 5: Solve for x
    x = 2,071,534,625.10/52,478.88
  6. Step 6: Final answer
    x = 39,473.68

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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.